On Mon, Aug 24, 2020 at 9:53 PM Gedare Bloom <ged...@rtems.org> wrote:
> On Mon, Aug 24, 2020 at 8:42 AM Niteesh G. S. <niteesh...@gmail.com> > wrote: > > > > ping. > > > pong. Most of us don't volunteer our time on the weekends. Some people > and open-source projects may, and I understand that the timeline for > finishing your project is getting tight, but you do want to be > courteous about other people's time. It is in general our most > precious commodity. > I am really sorry for pinging so quickly. I just wanted to get this ready before the deadline. > > On Sat, Aug 22, 2020 at 10:15 PM Niteesh G. S. <niteesh...@gmail.com> > wrote: > >> > >> Hello, > >> > >> I went through the history of the OF implementation in NetBSD and > FreeBSD. > >> I have summarized the things I have found out below. > >> > >> The first OF implementation seems to come from NetBSD this is actually > BSD-4 > >> licensed. FreeBSD and also other BSD have used this as the base and > improved > >> the API. For eg functions like OF_getprop_allloc_multi, OF_getencprop > were not > >> present in the original OF interface but were added by FreeBSD. And > also NetBSD > >> doesn't use KOBJS for function dispatch but rather uses > platform-specific OF > >> implementation, that is FDT implementation is present under > sys/dev/fdt/fdt_openfirm.c > >> powerPC implementation under arch/powerpc/openfirm.c. > >> NetBSD openfirm.h: > https://github.com/NetBSD/src/blob/trunk/sys/dev/ofw/openfirm.h > >> And I think was adding the OF interface FreeBSD has added the BSD-2 > license. > >> > >> > https://github.com/freebsd/freebsd/commit/d84d862cbd66f3f9ab4ce65fe69893664689c73b > >> This is the commit where they have added OF interface to FreeBSD and > from the > >> commit it seems like they have added the BSD-2 license with the > interface itself. > >> And the functions where we worry about the similarity are all FreeBSD > extension > >> so I guess we won't have any issue since they would come under BSD-2 > license. > >> > I think you could attempt to 'match' the imported 4-BSD code to any > current code, and remove it. see what is left. > > Alternately, you can copy the code that you know came from commits > with 2-BSD code and see what gaps remain at the end. > I'll do this. > My intuition here is that there are few if any original lines of code > left from that first 4-bsd import from NetBSD. > Yes. It is very little to almost no code that is BSD-4. > >> > >> Thanks, > >> Niteesh. > >> > >> On Sat, Aug 22, 2020 at 7:23 PM Gedare Bloom <ged...@rtems.org> wrote: > >>> > >>> On Fri, Aug 21, 2020 at 11:26 AM Niteesh G. S. <niteesh...@gmail.com> > wrote: > >>> > > >>> > > >>> > > >>> > On Fri, Aug 21, 2020 at 9:38 PM Gedare Bloom <ged...@rtems.org> > wrote: > >>> >> > >>> >> Hi Niteesh, > >>> >> > >>> >> Can you explain how you developed the new code in a way that ensures > >>> >> that we do not have any of the previously 4-BSD licensed code left? > >>> > > >>> > The FDT implementation of the OF interface present is ofw_fdt.c is, > fortunately, > >>> > BSD-2 licensed so I was able to copy/reuse most of it for RTEMS ofw.c > >>> > > >>> > The interface(openfirm.h) and the implementation(opefirm.c) that > calls the > >>> > respective KOBJs functions are BSD-4 licensed. Since it was > mentioned that > >>> > copying the interface is fine I don't think there is an issue with > it. The OF > >>> > interface in RTEMS is present in ofw_compat.h > >>> > > >>> > I also want to make note of one thing, there are few functions in > ofw.c > >>> > which look exactly the same as the ones present in openfirm.c can you > >>> > please make sure that these functions won't cause any issues. > >>> > Few examples are, rtems_ofw_get_enc_prop_alloc, > rtems_ofw_get_enc_prop_alloc_multi. > >>> > > >>> The similarity in these functions is problematic. > >>> > >>> I still think it would be worth the trouble to try to dig through the > >>> history to find exactly what code was introduced with the 4-bsd. I > >>> would guess that came out of netbsd. > >>> > >>> > Thanks, > >>> > Niteesh. > >>> > > >>> >> > >>> >> Gedare > >>> >> > >>> >> On Thu, Aug 20, 2020 at 1:52 AM G S Niteesh Babu < > niteesh...@gmail.com> wrote: > >>> >> > > >>> >> > RTEMS OFW is a FDT only implementation of the OpenFirmWare > >>> >> > interface. This API is created to be compatible with FreeBSD > >>> >> > OpenFirmWare interface. The main intention is to make > >>> >> > porting of FreeBSD drivers to RTEMS easier. > >>> >> > > >>> >> > Most functions implemented have an direct one-one mapping > >>> >> > with the original OFW API and some extra auxiliary functions > >>> >> > were implemented to make working with device trees easier in > >>> >> > RTEMS. > >>> >> > > >>> >> > Update #3784 > >>> >> > --- > >>> >> > bsps/include/ofw/ofw.h | 548 +++++++++++++++++++++++++++ > >>> >> > bsps/include/ofw/ofw_compat.h | 74 ++++ > >>> >> > bsps/shared/ofw/ofw.c | 670 > ++++++++++++++++++++++++++++++++++ > >>> >> > spec/build/bsps/obj.yml | 4 + > >>> >> > 4 files changed, 1296 insertions(+) > >>> >> > create mode 100644 bsps/include/ofw/ofw.h > >>> >> > create mode 100644 bsps/include/ofw/ofw_compat.h > >>> >> > create mode 100644 bsps/shared/ofw/ofw.c > >>> >> > > >>> >> > diff --git a/bsps/include/ofw/ofw.h b/bsps/include/ofw/ofw.h > >>> >> > new file mode 100644 > >>> >> > index 0000000000..50f64ff695 > >>> >> > --- /dev/null > >>> >> > +++ b/bsps/include/ofw/ofw.h > >>> >> > @@ -0,0 +1,548 @@ > >>> >> > +/* SPDX-License-Identifier: BSD-2-Clause */ > >>> >> > + > >>> >> > +/** > >>> >> > + * @file > >>> >> > + * > >>> >> > + * @ingroup ofw > >>> >> > + * > >>> >> > + * RTEMS FDT implementation of OpenFirmWare Interface. > >>> >> > + * > >>> >> > + * RTEMS OFW is a FDT only implementation of the OpenFirmWare > interface. > >>> >> > + * This API is created to be compatible with FreeBSD > OpenFirmWare interface. > >>> >> > + * The main intention is to make porting of FreeBSD drivers to > RTEMS easier. > >>> >> > + */ > >>> >> > + > >>> >> > +/* > >>> >> > + * Copyright (C) 2020 Niteesh Babu G S <niteesh...@gmail.com> > >>> >> > + * > >>> >> > + * Redistribution and use in source and binary forms, with or > without > >>> >> > + * modification, are permitted provided that the following > conditions > >>> >> > + * are met: > >>> >> > + * 1. Redistributions of source code must retain the above > copyright > >>> >> > + * notice, this list of conditions and the following > disclaimer. > >>> >> > + * 2. Redistributions in binary form must reproduce the above > copyright > >>> >> > + * notice, this list of conditions and the following > disclaimer in the > >>> >> > + * documentation and/or other materials provided with the > distribution. > >>> >> > + * > >>> >> > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND > CONTRIBUTORS "AS IS" > >>> >> > + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT > LIMITED TO, THE > >>> >> > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A > PARTICULAR PURPOSE > >>> >> > + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR > CONTRIBUTORS BE > >>> >> > + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, > EXEMPLARY, OR > >>> >> > + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, > PROCUREMENT OF > >>> >> > + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; > OR BUSINESS > >>> >> > + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, > WHETHER IN > >>> >> > + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR > OTHERWISE) > >>> >> > + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF > ADVISED OF THE > >>> >> > + * POSSIBILITY OF SUCH DAMAGE. > >>> >> > + */ > >>> >> > + > >>> >> > +#ifndef _OFW_H > >>> >> > +#define _OFW_H > >>> >> > + > >>> >> > +#ifdef __cplusplus > >>> >> > +extern "C" { > >>> >> > +#endif > >>> >> > + > >>> >> > +#include <rtems.h> > >>> >> > +#include <stdint.h> > >>> >> > +#include <stddef.h> > >>> >> > + > >>> >> > +/** > >>> >> > + * Represents a node in the device tree. The offset from fdtp to > node is used > >>> >> > + * instead of fdt offset to make sure this is compatible with OF > interface in > >>> >> > + * FreeBSD. > >>> >> > + */ > >>> >> > +typedef uint32_t phandle_t; > >>> >> > +/** > >>> >> > + * Represents the effective phandle of the node. > >>> >> > + */ > >>> >> > +typedef uint32_t ihandle_t; > >>> >> > +/** > >>> >> > + * Represents the data type of the buffer. > >>> >> > + */ > >>> >> > +typedef uint32_t pcell_t; > >>> >> > + > >>> >> > +/** > >>> >> > + * @struct rtems_ofw_memory_area > >>> >> > + * > >>> >> > + * This is used to represent elements(FDT properties) that define > >>> >> > + * region of memory address. > >>> >> > + */ > >>> >> > +typedef struct { > >>> >> > + /** The start address of the memory region. */ > >>> >> > + uint32_t start; > >>> >> > + /** The size of the memory region. */ > >>> >> > + uint32_t size; > >>> >> > +} rtems_ofw_memory_area; > >>> >> > + > >>> >> > +/** > >>> >> > + * @struct rtems_ofw_ranges > >>> >> > + * > >>> >> > + * This is used to represent the ranges property in the device > tree. > >>> >> > + */ > >>> >> > +typedef struct { > >>> >> > + /** The physical address within the child bus address space */ > >>> >> > + uint32_t child_bus; > >>> >> > + /** The physical address within the parent bus address space */ > >>> >> > + uint32_t parent_bus; > >>> >> > + /** The size of the range in the child’s address space */ > >>> >> > + uint32_t size; > >>> >> > +} rtems_ofw_ranges; > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets the node that is next to @a node. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * > >>> >> > + * @retval Peer node offset Successful operation. > >>> >> > + * @retval 0 No peer node or invalid node handle > >>> >> > + */ > >>> >> > +phandle_t rtems_ofw_peer( > >>> >> > + phandle_t node > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets the node that is the child of @a node. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * > >>> >> > + * @retval child node offset Successful operation. > >>> >> > + * @retval 0 No child node or invalid node handle > >>> >> > + */ > >>> >> > +phandle_t rtems_ofw_child( > >>> >> > + phandle_t node > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets the node that is the parent of @a node. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * > >>> >> > + * @retval child node offset Successful operation. > >>> >> > + * @retval 0 No child node or invalid node handle > >>> >> > + */ > >>> >> > +phandle_t rtems_ofw_parent( > >>> >> > + phandle_t node > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets the length of the property mentioned in @a > propname. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] prop Property name > >>> >> > + * > >>> >> > + * @retval -1 Invalid node or property > >>> >> > + * @retval Length of property on successful operation > >>> >> > + */ > >>> >> > +size_t rtems_ofw_get_prop_len( > >>> >> > + phandle_t node, > >>> >> > + const char *propname > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets the value of property mentioned in @a propname. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] prop Property name > >>> >> > + * @param[out] buf The property value gets stored in this buffer > (Pre-allocated) > >>> >> > + * @param[in] len Length of the buffer > >>> >> > + > >>> >> > + * @retval -1 Invalid node or property > >>> >> > + * @retval Length of property on successful operation > >>> >> > + */ > >>> >> > +size_t rtems_ofw_get_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + void *buf, > >>> >> > + size_t len > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets the value of property mentioned in @a prop. > >>> >> > + * > >>> >> > + * Gets the value of property of @a node and converts the value > into the host's > >>> >> > + * endianness. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] prop Property name > >>> >> > + * @param[out] buf The property value gets stored in this > buffer(Pre-allocated) > >>> >> > + * after converted to the host's endianness > >>> >> > + * @param[in] len Length of the buffer > >>> >> > + * > >>> >> > + * @retval -1 Invalid node or property > >>> >> > + * @retval Length of property on successful operation > >>> >> > + */ > >>> >> > +size_t rtems_ofw_get_enc_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *prop, > >>> >> > + pcell_t *buf, > >>> >> > + size_t len > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Checks if the property @a propname is present in @a > node. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] propname Property name > >>> >> > + * > >>> >> > + * @retval 0 Property not present. > >>> >> > + * @retval 1 Property is present. > >>> >> > + */ > >>> >> > +int rtems_ofw_has_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *propname > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Searches for property @a propname in @a node. > >>> >> > + * > >>> >> > + * Searches the node and its parent recursively for the property > and fills the > >>> >> > + * buffer with the first found value. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] propname Property name > >>> >> > + * @param[out] buf The property value gets stored in this buffer > (Pre-allocated) > >>> >> > + * @param[in] len Length of the buffer > >>> >> > + * > >>> >> > + * @retval Length of the property if property is found. > >>> >> > + * @retval -1 Property is not found. > >>> >> > + */ > >>> >> > +size_t rtems_ofw_search_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + void *buf, > >>> >> > + size_t len > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Searches for property @a propname in @a node. > >>> >> > + * > >>> >> > + * Searches the node and its parent recursively for the property > and fills the > >>> >> > + * buffer with the first value found after converting it to the > endianness of > >>> >> > + * the host. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] propname Property name > >>> >> > + * @param[out] buf The property value gets stored in this > buffer(Pre-allocated) > >>> >> > + * after converted to the host's endianness > >>> >> > + * @param[in] len Length of the buffer > >>> >> > + * > >>> >> > + * @retval Length of the property if property is found. > >>> >> > + * @retval -1 Property is not found. > >>> >> > + */ > >>> >> > +size_t rtems_ofw_search_enc_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + pcell_t *buf, > >>> >> > + size_t len > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets the value of property mentioned in @a propname. > >>> >> > + * > >>> >> > + * Same as rtems_ofw_getprop, but the @a buf is allocated in > this routine and > >>> >> > + * the user is responsible for freeing it. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] propname Property name > >>> >> > + * @param[out] buf The buffer is allocated in this routine and > user is > >>> >> > + * responsible for freeing. > >>> >> > + * > >>> >> > + * @retval -1 Property is not found. > >>> >> > + * @retval Length of the property if property is found. > >>> >> > + */ > >>> >> > +size_t rtems_ofw_get_prop_alloc( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + void **buf > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets multiple values of the property @a propname. > >>> >> > + * > >>> >> > + * Same as rtems_ofw_getprop_alloc but it can read properties > with multiple > >>> >> > + * values. > >>> >> > + * For eg: reg = <0x1000 0x10 0x2000 0x20> > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] propname Property name > >>> >> > + * @param[in] elsz Size of the single value > >>> >> > + * @param[out] buf The buffer is allocated in this routine and > user is > >>> >> > + * responsible for freeing. > >>> >> > + * > >>> >> > + * @retval -1 Property is not found. > >>> >> > + * @retval Number of values read. > >>> >> > + */ > >>> >> > +size_t rtems_ofw_get_prop_alloc_multi( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + int elsz, > >>> >> > + void **buf > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets the value of property mentioned in @a propname. > >>> >> > + * > >>> >> > + * Same as rtems_ofw_getprop_alloc but the value stored in the > buffer is > >>> >> > + * converted into the host's endianness. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] propname Property name > >>> >> > + * @param[out] buf The buffer is allocated in this routine and > user is > >>> >> > + * responsible for freeing. > >>> >> > + * > >>> >> > + * @retval -1 Property is not found. > >>> >> > + * @retval Length of the property if property is found. > >>> >> > + */ > >>> >> > +size_t rtems_ofw_get_enc_prop_alloc( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + void **buf > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets multiple values of the property @a propname. > >>> >> > + * > >>> >> > + * Same as rtems_ofw_getprop_alloc_multi but the values stored > in the buffer > >>> >> > + * are converted to the host's endianness. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] propname Property name > >>> >> > + * @param[in] elsz Size of the single value > >>> >> > + * @param[out] buf The buffer is allocated in this routine and > user is > >>> >> > + * responsible for freeing. > >>> >> > + * > >>> >> > + * @retval -1 Property is not found. > >>> >> > + * @retval Number of values read. > >>> >> > + */ > >>> >> > +size_t rtems_ofw_get_enc_prop_alloc_multi( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + int elsz, > >>> >> > + void **buf > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Free's the buffers allocated by the rtems_ofw_*_alloc > functions. > >>> >> > + * > >>> >> > + * @param[in] buf Buffer to be freed > >>> >> > + */ > >>> >> > +void rtems_ofw_free( > >>> >> > + void *buf > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Finds the next property of @a node. > >>> >> > + * > >>> >> > + * Finds the next property of the node and when @a propname is > NULL it returns > >>> >> > + * the value in the first property. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] previous Previous property name > >>> >> > + * @param[out] buf The value of the next property gets stored in > this buffer > >>> >> > + * (Pre-allocated) > >>> >> > + * @param[in] len Length of the buffer > >>> >> > + * > >>> >> > + * @retval -1 node or previous property does not exist > >>> >> > + * @retval 0 no more properties > >>> >> > + * @retval 1 success > >>> >> > + */ > >>> >> > +int rtems_ofw_next_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *previous, > >>> >> > + char *buf, > >>> >> > + size_t len > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Sets the property @name of @a node to @a buf. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[in] name Property name > >>> >> > + * @param[in] buf Buffer contains the value to be set. > >>> >> > + * @param[in] len Length of the buffer > >>> >> > + * > >>> >> > + * @retval -1 node does not exist > >>> >> > + * @retval 0 on success > >>> >> > + * @retval libFDT error codes on unsuccessful setting operation > >>> >> > + */ > >>> >> > +int rtems_ofw_set_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *name, > >>> >> > + const void *buf, > >>> >> > + size_t len > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Converts a device specifier to a fully qualified path > name. > >>> >> > + * > >>> >> > + * @param[in] dev device specifier > >>> >> > + * @param[out] buf The path is filled into the > buffer(Pre-allocated) > >>> >> > + * @param[in] length of the buffer > >>> >> > + * > >>> >> > + * @retval -1 always. Unimplemented. > >>> >> > + */ > >>> >> > +size_t rtems_ofw_canon( > >>> >> > + const char *dev, > >>> >> > + char *buf, > >>> >> > + size_t len > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Finds the node at the given path > >>> >> > + * > >>> >> > + * @param[in] path to the node from root > >>> >> > + * > >>> >> > + * @retval -1 node does not exist > >>> >> > + * @retval node handle on success > >>> >> > + */ > >>> >> > +phandle_t rtems_ofw_find_device( > >>> >> > + const char *path > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief This routine converts effective phandle @a xref to > node offset. > >>> >> > + * > >>> >> > + * @param[in] xref Node phandle > >>> >> > + * > >>> >> > + * @retval Node offset on success > >>> >> > + * @retval Node phandle on failure > >>> >> > + */ > >>> >> > +phandle_t rtems_ofw_node_from_xref( > >>> >> > + phandle_t xref > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief This routine converts node offset to effective phandle > of @a node. > >>> >> > + * > >>> >> > + * @retval Node phandle on success > >>> >> > + * @retval Node offset on failure > >>> >> > + */ > >>> >> > +phandle_t rtems_ofw_xref_from_node( > >>> >> > + phandle_t node > >>> >> > +); > >>> >> > + > >>> >> > +/* > >>> >> > + * instance handles(ihandle_t) as same as phandles in the FDT > implementation > >>> >> > + * of OF interface. > >>> >> > + */ > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Converts @a instance handle to phandle. > >>> >> > + * > >>> >> > + * instance are same as node offsets in FDT. > >>> >> > + * > >>> >> > + * @param[in] instance Node offset > >>> >> > + * > >>> >> > + * @retval phandle of node on success. > >>> >> > + * @retval instance of node on failure. > >>> >> > + */ > >>> >> > +phandle_t rtems_ofw_instance_to_package( > >>> >> > + ihandle_t instance > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Find the node's path from phandle. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[out] buf Path is filled into this > buffer(Pre-allocated). > >>> >> > + * @param[in] len Length of the buffer. > >>> >> > + * > >>> >> > + * @retval -1 always. Unimplemented. > >>> >> > + */ > >>> >> > +size_t rtems_ofw_package_to_path( > >>> >> > + phandle_t node, > >>> >> > + char *buf, > >>> >> > + size_t len > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Find the node's path from ihandle. > >>> >> > + * > >>> >> > + * @param[in] instance Node offset > >>> >> > + * @param[out] buf Path is filled into this > buffer(Pre-allocated). > >>> >> > + * @param[in] len Length of the buffer. > >>> >> > + * > >>> >> > + * @retval -1 always. Unimplemented. > >>> >> > + */ > >>> >> > +size_t rtems_ofw_instance_to_path( > >>> >> > + ihandle_t instance, > >>> >> > + char *buf, > >>> >> > + size_t len > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Queries the node's reg value. > >>> >> > + * > >>> >> > + * This routine fills the buffer @a buf with the values in reg > property of node > >>> >> > + * @a node. It reads all the values of the property and fills > the buffer to max > >>> >> > + * size. > >>> >> > + * This routine is local to RTEMS OFW and does not have an > corresponding > >>> >> > + * FreeBSD OFW pair. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[out] buf Register values are stored in this > buffer(Pre-allocated). > >>> >> > + * @param[in] size Length of the buffer. > >>> >> > + * > >>> >> > + * @retval -1 If reg property is missing. > >>> >> > + * @retval Length of the reg property in bytes. > >>> >> > + */ > >>> >> > +int rtems_ofw_get_reg( > >>> >> > + phandle_t node, > >>> >> > + rtems_ofw_memory_area *buf, > >>> >> > + size_t size > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Queries the node's interrupt value. > >>> >> > + * > >>> >> > + * This routine fills the buffer @a buf with the interrupt > number. In case of > >>> >> > + * multiple numbers it fills the buffer to its full extent. > >>> >> > + * This routine is local to RTEMS OFW and does not have an > corresponding > >>> >> > + * FreeBSD OFW pair. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * @param[out] buf Interrupt values are stored in this > buffer(Pre-allocated). > >>> >> > + * @param[in] size Length of the buffer. > >>> >> > + * > >>> >> > + * @retval -1 If interrupts property is missing. > >>> >> > + * @retval The number of interrupt numbers read. > >>> >> > + */ > >>> >> > +int rtems_ofw_get_interrupts( > >>> >> > + phandle_t node, > >>> >> > + rtems_vector_number *buf, > >>> >> > + size_t size > >>> >> > +); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Queries the node's status. > >>> >> > + * > >>> >> > + * This routine is local to RTEMS OFW and does not have an > corresponding > >>> >> > + * FreeBSD OFW pair. > >>> >> > + * > >>> >> > + * @param[in] node Node offset > >>> >> > + * > >>> >> > + * @retval true Status is OK or empty. > >>> >> > + * @retval false Status is not OK or missing. > >>> >> > + */ > >>> >> > +bool rtems_ofw_node_status( phandle_t node ); > >>> >> > + > >>> >> > +/** > >>> >> > + * @brief Gets node phandle from compatible property. > >>> >> > + * > >>> >> > + * This routine is local to RTEMS OFW and does not have an > corresponding > >>> >> > + * FreeBSD OFW pair. > >>> >> > + * > >>> >> > + * @param[in] compat Compatible string > >>> >> > + * > >>> >> > + * @retval 0 Node with @a compat as compatible string not found > >>> >> > + * @retval Node phandle on success. > >>> >> > + */ > >>> >> > +phandle_t rtems_ofw_find_device_by_compat( const char *compat ); > >>> >> > + > >>> >> > +#ifdef __cplusplus > >>> >> > +} > >>> >> > +#endif > >>> >> > + > >>> >> > +#endif /* _OFW_H */ > >>> >> > diff --git a/bsps/include/ofw/ofw_compat.h > b/bsps/include/ofw/ofw_compat.h > >>> >> > new file mode 100644 > >>> >> > index 0000000000..be4a5ea3ce > >>> >> > --- /dev/null > >>> >> > +++ b/bsps/include/ofw/ofw_compat.h > >>> >> > @@ -0,0 +1,74 @@ > >>> >> > +/* SPDX-License-Identifier: BSD-2-Clause */ > >>> >> > + > >>> >> > +/** > >>> >> > + * @file > >>> >> > + * > >>> >> > + * @ingroup ofw > >>> >> > + * > >>> >> > + * This file defines necessary symbols to make the RTEMS OFW API > compatible > >>> >> > + * with FreeBSD OFW. > >>> >> > + */ > >>> >> > + > >>> >> > +/* > >>> >> > + * Copyright (C) 2020 Niteesh Babu G S <niteesh...@gmail.com> > >>> >> > + * > >>> >> > + * Redistribution and use in source and binary forms, with or > without > >>> >> > + * modification, are permitted provided that the following > conditions > >>> >> > + * are met: > >>> >> > + * 1. Redistributions of source code must retain the above > copyright > >>> >> > + * notice, this list of conditions and the following > disclaimer. > >>> >> > + * 2. Redistributions in binary form must reproduce the above > copyright > >>> >> > + * notice, this list of conditions and the following > disclaimer in the > >>> >> > + * documentation and/or other materials provided with the > distribution. > >>> >> > + * > >>> >> > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND > CONTRIBUTORS "AS IS" > >>> >> > + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT > LIMITED TO, THE > >>> >> > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A > PARTICULAR PURPOSE > >>> >> > + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR > CONTRIBUTORS BE > >>> >> > + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, > EXEMPLARY, OR > >>> >> > + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, > PROCUREMENT OF > >>> >> > + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; > OR BUSINESS > >>> >> > + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, > WHETHER IN > >>> >> > + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR > OTHERWISE) > >>> >> > + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF > ADVISED OF THE > >>> >> > + * POSSIBILITY OF SUCH DAMAGE. > >>> >> > + */ > >>> >> > + > >>> >> > +#ifndef _OFW_COMPAT_H > >>> >> > +#define _OFW_COMPAT_H > >>> >> > + > >>> >> > +#ifdef __cplusplus > >>> >> > +extern "C" { > >>> >> > +#endif > >>> >> > + > >>> >> > +#include <ofw/ofw.h> > >>> >> > + > >>> >> > +#define OF_peer rtems_ofw_peer > >>> >> > +#define OF_child rtems_ofw_child > >>> >> > +#define OF_parent rtems_ofw_parent > >>> >> > +#define OF_getproplen rtems_ofw_get_prop_len > >>> >> > +#define OF_getprop rtems_ofw_get_prop > >>> >> > +#define OF_getencprop rtems_ofw_get_enc_prop > >>> >> > +#define OF_hasprop rtems_ofw_has_prop > >>> >> > +#define OF_searchprop rtems_ofw_search_prop > >>> >> > +#define OF_searchencprop rtems_ofw_search_enc_prop > >>> >> > +#define OF_getprop_alloc rtems_ofw_get_prop_alloc > >>> >> > +#define OF_getprop_alloc_multi rtems_ofw_get_prop_alloc_multi > >>> >> > +#define OF_getencprop_alloc_multi > rtems_ofw_get_enc_prop_alloc_multi > >>> >> > +#define OF_getencprop_alloc rtems_ofw_get_enc_prop_alloc > >>> >> > +#define OF_prop_free rtems_ofw_free > >>> >> > +#define OF_nextprop rtems_ofw_next_prop > >>> >> > +#define OF_setprop rtems_ofw_set_prop > >>> >> > +#define OF_canon rtems_ofw_canon > >>> >> > +#define OF_finddevice rtems_ofw_find_device > >>> >> > +#define OF_package_to_path rtems_ofw_package_to_path > >>> >> > +#define OF_node_from_xref rtems_ofw_node_from_xref > >>> >> > +#define OF_xref_from_node rtems_ofw_xref_from_node > >>> >> > +#define OF_instance_to_package rtems_ofw_instance_to_package > >>> >> > +#define OF_instance_to_path rtems_ofw_instance_to_path > >>> >> > + > >>> >> > +#ifdef __cplusplus > >>> >> > +} > >>> >> > +#endif > >>> >> > + > >>> >> > +#endif /* _OFW_COMPAT_H */ > >>> >> > diff --git a/bsps/shared/ofw/ofw.c b/bsps/shared/ofw/ofw.c > >>> >> > new file mode 100644 > >>> >> > index 0000000000..481b29553b > >>> >> > --- /dev/null > >>> >> > +++ b/bsps/shared/ofw/ofw.c > >>> >> > @@ -0,0 +1,670 @@ > >>> >> > +/* SPDX-License-Identifier: BSD-2-Clause */ > >>> >> > + > >>> >> > +/** > >>> >> > + * @file > >>> >> > + * > >>> >> > + * @ingroup ofw > >>> >> > + */ > >>> >> > + > >>> >> > +/* > >>> >> > + * Copyright (C) 2020 Niteesh Babu G S <niteesh...@gmail.com> > >>> >> > + * > >>> >> > + * Redistribution and use in source and binary forms, with or > without > >>> >> > + * modification, are permitted provided that the following > conditions > >>> >> > + * are met: > >>> >> > + * 1. Redistributions of source code must retain the above > copyright > >>> >> > + * notice, this list of conditions and the following > disclaimer. > >>> >> > + * 2. Redistributions in binary form must reproduce the above > copyright > >>> >> > + * notice, this list of conditions and the following > disclaimer in the > >>> >> > + * documentation and/or other materials provided with the > distribution. > >>> >> > + * > >>> >> > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND > CONTRIBUTORS "AS IS" > >>> >> > + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT > LIMITED TO, THE > >>> >> > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A > PARTICULAR PURPOSE > >>> >> > + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR > CONTRIBUTORS BE > >>> >> > + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, > EXEMPLARY, OR > >>> >> > + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, > PROCUREMENT OF > >>> >> > + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; > OR BUSINESS > >>> >> > + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, > WHETHER IN > >>> >> > + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR > OTHERWISE) > >>> >> > + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF > ADVISED OF THE > >>> >> > + * POSSIBILITY OF SUCH DAMAGE. > >>> >> > + */ > >>> >> > + > >>> >> > +#ifdef HAVE_CONFIG_H > >>> >> > +#include "config.h" > >>> >> > +#endif > >>> >> > + > >>> >> > +#include <bsp/fdt.h> > >>> >> > +#include <sys/param.h> > >>> >> > +#include <ofw/ofw.h> > >>> >> > +#include <libfdt.h> > >>> >> > +#include <assert.h> > >>> >> > +#include <rtems/sysinit.h> > >>> >> > + > >>> >> > +const void *fdtp = NULL; > >>> >> > + > >>> >> > +static phandle_t rtems_fdt_offset_to_phandle( int offset ) > >>> >> > +{ > >>> >> > + if (offset < 0) { > >>> >> > + return 0; > >>> >> > + } > >>> >> > + > >>> >> > + return (phandle_t)offset + fdt_off_dt_struct(fdtp); > >>> >> > +} > >>> >> > + > >>> >> > +static int rtems_fdt_phandle_to_offset( phandle_t handle ) > >>> >> > +{ > >>> >> > + int off; > >>> >> > + int fdt_off; > >>> >> > + > >>> >> > + off = (int) handle; > >>> >> > + fdt_off = fdt_off_dt_struct(fdtp); > >>> >> > + > >>> >> > + if (off < fdt_off) { > >>> >> > + return -1; > >>> >> > + > >>> >> > + } > >>> >> > + > >>> >> > + return off - fdt_off; > >>> >> > +} > >>> >> > + > >>> >> > +static void rtems_ofw_init( void ) { > >>> >> > + int rv; > >>> >> > + const void *fdt; > >>> >> > + > >>> >> > + fdt = bsp_fdt_get(); > >>> >> > + > >>> >> > + rv = fdt_check_header(fdt); > >>> >> > + > >>> >> > + /* > >>> >> > + * If the FDT is invalid exit through fatal. > >>> >> > + */ > >>> >> > + if (rv != 0) { > >>> >> > + rtems_fatal_error_occurred(RTEMS_NOT_CONFIGURED); > >>> >> > + } > >>> >> > + > >>> >> > + fdtp = fdt; > >>> >> > +} > >>> >> > + > >>> >> > +RTEMS_SYSINIT_ITEM( > >>> >> > + rtems_ofw_init, > >>> >> > + RTEMS_SYSINIT_BSP_PRE_DRIVERS, > >>> >> > + RTEMS_SYSINIT_ORDER_FIRST > >>> >> > +); > >>> >> > + > >>> >> > +phandle_t rtems_ofw_peer( phandle_t node ) > >>> >> > +{ > >>> >> > + int offset; > >>> >> > + > >>> >> > + if (node == 0) { > >>> >> > + int root = fdt_path_offset(fdtp, "/"); > >>> >> > + return rtems_fdt_offset_to_phandle(root); > >>> >> > + } > >>> >> > + > >>> >> > + offset = rtems_fdt_phandle_to_offset(node); > >>> >> > + if (offset < 0) { > >>> >> > + return 0; > >>> >> > + } > >>> >> > + > >>> >> > + offset = fdt_next_subnode(fdtp, offset); > >>> >> > + return rtems_fdt_offset_to_phandle(offset); > >>> >> > +} > >>> >> > + > >>> >> > +phandle_t rtems_ofw_child( phandle_t node ) > >>> >> > +{ > >>> >> > + int offset; > >>> >> > + > >>> >> > + offset = rtems_fdt_phandle_to_offset(node); > >>> >> > + > >>> >> > + if (offset < 0) { > >>> >> > + return 0; > >>> >> > + } > >>> >> > + > >>> >> > + offset = fdt_first_subnode(fdtp, offset); > >>> >> > + return rtems_fdt_offset_to_phandle(offset); > >>> >> > +} > >>> >> > + > >>> >> > +phandle_t rtems_ofw_parent( phandle_t node ) > >>> >> > +{ > >>> >> > + int offset; > >>> >> > + > >>> >> > + offset = rtems_fdt_phandle_to_offset(node); > >>> >> > + > >>> >> > + if (offset < 0) { > >>> >> > + return 0; > >>> >> > + } > >>> >> > + > >>> >> > + offset = fdt_parent_offset(fdtp, offset); > >>> >> > + return rtems_fdt_offset_to_phandle(offset); > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_get_prop_len( > >>> >> > + phandle_t node, > >>> >> > + const char *propname > >>> >> > +) > >>> >> > +{ > >>> >> > + int offset; > >>> >> > + int len; > >>> >> > + const void *prop; > >>> >> > + > >>> >> > + offset = rtems_fdt_phandle_to_offset(node); > >>> >> > + > >>> >> > + if (offset < 0) { > >>> >> > + return -1; > >>> >> > + } > >>> >> > + > >>> >> > + prop = fdt_getprop(fdtp, offset, propname, &len); > >>> >> > + > >>> >> > + if (prop == NULL && strcmp(propname, "name") == 0) { > >>> >> > + fdt_get_name(fdtp, offset, &len); > >>> >> > + return len + 1; > >>> >> > + } > >>> >> > + > >>> >> > + if (prop == NULL && strcmp(propname, "/chosen") == 0) { > >>> >> > + if (strcmp(propname, "fdtbootcpu") == 0) > >>> >> > + return sizeof(pcell_t); > >>> >> > + if (strcmp(propname, "fdtmemreserv") == 0) > >>> >> > + return 2 * sizeof(uint64_t) * fdt_num_mem_rsv(fdtp); > >>> >> > + } > >>> >> > + > >>> >> > + if (prop == NULL) { > >>> >> > + return -1; > >>> >> > + } > >>> >> > + > >>> >> > + return len; > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_get_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + void *buf, > >>> >> > + size_t bufsize > >>> >> > +) > >>> >> > +{ > >>> >> > + const void *prop; > >>> >> > + int offset; > >>> >> > + int len; > >>> >> > + uint32_t cpuid; > >>> >> > + > >>> >> > + offset = rtems_fdt_phandle_to_offset(node); > >>> >> > + > >>> >> > + if (offset < 0) { > >>> >> > + return -1; > >>> >> > + } > >>> >> > + > >>> >> > + prop = fdt_getprop(fdtp, offset, propname, &len); > >>> >> > + > >>> >> > + if (prop == NULL && strcmp(propname, "name") == 0) { > >>> >> > + prop = fdt_get_name(fdtp, offset, &len); > >>> >> > + strncpy(buf, prop, bufsize); > >>> >> > + return len + 1; > >>> >> > + } > >>> >> > + > >>> >> > + if (prop == NULL && strcmp(propname, "/chosen") == 0) { > >>> >> > + if (strcmp(propname, "fdtbootcpu") == 0) { > >>> >> > + cpuid = cpu_to_fdt32(fdt_boot_cpuid_phys(fdtp)); > >>> >> > + len = sizeof(cpuid); > >>> >> > + prop = &cpuid; > >>> >> > + } > >>> >> > + if (strcmp(propname, "fdtmemreserv") == 0) { > >>> >> > + prop = (char *)fdtp + fdt_off_mem_rsvmap(fdtp); > >>> >> > + len = sizeof(uint64_t)*2*fdt_num_mem_rsv(fdtp); > >>> >> > + } > >>> >> > + } > >>> >> > + > >>> >> > + if (prop == NULL) { > >>> >> > + return -1; > >>> >> > + } > >>> >> > + > >>> >> > + bcopy(prop, buf, MIN(len, bufsize)); > >>> >> > + > >>> >> > + return len; > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_get_enc_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *prop, > >>> >> > + pcell_t *buf, > >>> >> > + size_t len > >>> >> > +) > >>> >> > +{ > >>> >> > + size_t rv; > >>> >> > + > >>> >> > + assert(len % 4 == 0); > >>> >> > + rv = rtems_ofw_get_prop(node, prop, buf, len); > >>> >> > + > >>> >> > + if (rv < 0) { > >>> >> > + return rv; > >>> >> > + } > >>> >> > + > >>> >> > + for (int i = 0; i < (len / 4); i++) { > >>> >> > + buf[i] = fdt32_to_cpu(buf[i]); > >>> >> > + } > >>> >> > + > >>> >> > + return rv; > >>> >> > +} > >>> >> > + > >>> >> > +int rtems_ofw_has_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *propname > >>> >> > +) > >>> >> > +{ > >>> >> > + size_t rv; > >>> >> > + > >>> >> > + rv = rtems_ofw_get_prop_len(node, propname); > >>> >> > + return rv >= 0 ? 1 : 0; > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_search_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + void *buf, > >>> >> > + size_t len > >>> >> > +) > >>> >> > +{ > >>> >> > + size_t rv; > >>> >> > + > >>> >> > + for (; node != 0; node = rtems_ofw_parent(node)) { > >>> >> > + if ((rv = rtems_ofw_get_prop(node, propname, buf, len) != > -1)) { > >>> >> > + return rv; > >>> >> > + } > >>> >> > + } > >>> >> > + > >>> >> > + return -1; > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_search_enc_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + pcell_t *buf, > >>> >> > + size_t len > >>> >> > +) > >>> >> > +{ > >>> >> > + size_t rv; > >>> >> > + > >>> >> > + for (; node != 0; node = rtems_ofw_parent(node)) { > >>> >> > + if ((rv = rtems_ofw_get_enc_prop(node, propname, buf, len) > != -1)) { > >>> >> > + return rv; > >>> >> > + } > >>> >> > + } > >>> >> > + > >>> >> > + return -1; > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_get_prop_alloc( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + void **buf > >>> >> > +) > >>> >> > +{ > >>> >> > + size_t len; > >>> >> > + > >>> >> > + *buf = NULL; > >>> >> > + if ((len = rtems_ofw_get_prop_len(node, propname)) == -1) { > >>> >> > + return -1; > >>> >> > + } > >>> >> > + > >>> >> > + if (len > 0) { > >>> >> > + *buf = malloc(len); > >>> >> > + > >>> >> > + if (rtems_ofw_get_prop(node, propname, *buf, len) == -1) { > >>> >> > + rtems_ofw_free(buf); > >>> >> > + *buf = NULL; > >>> >> > + return -1; > >>> >> > + } > >>> >> > + } > >>> >> > + > >>> >> > + return len; > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_get_prop_alloc_multi( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + int elsz, > >>> >> > + void **buf > >>> >> > +) > >>> >> > +{ > >>> >> > + size_t len; > >>> >> > + > >>> >> > + *buf = NULL; > >>> >> > + if ((len = rtems_ofw_get_prop_len(node, propname)) == -1 || > >>> >> > + (len % elsz != 0)) { > >>> >> > + return -1; > >>> >> > + } > >>> >> > + > >>> >> > + if (len > 0) { > >>> >> > + *buf = malloc(len); > >>> >> > + > >>> >> > + if (rtems_ofw_get_prop(node, propname, *buf, len) == -1) { > >>> >> > + rtems_ofw_free(buf); > >>> >> > + *buf = NULL; > >>> >> > + return -1; > >>> >> > + } > >>> >> > + } > >>> >> > + > >>> >> > + return (len / elsz); > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_get_enc_prop_alloc( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + void **buf > >>> >> > +) > >>> >> > +{ > >>> >> > + size_t len; > >>> >> > + > >>> >> > + *buf = NULL; > >>> >> > + if ((len = rtems_ofw_get_prop_len(node, propname)) == -1) { > >>> >> > + return -1; > >>> >> > + } > >>> >> > + > >>> >> > + if (len > 0) { > >>> >> > + *buf = malloc(len); > >>> >> > + > >>> >> > + if (rtems_ofw_get_enc_prop(node, propname, *buf, len) == -1) > { > >>> >> > + rtems_ofw_free(buf); > >>> >> > + *buf = NULL; > >>> >> > + return -1; > >>> >> > + } > >>> >> > + } > >>> >> > + > >>> >> > + return len; > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_get_enc_prop_alloc_multi( > >>> >> > + phandle_t node, > >>> >> > + const char *propname, > >>> >> > + int elsz, > >>> >> > + void **buf > >>> >> > +) > >>> >> > +{ > >>> >> > + size_t len; > >>> >> > + > >>> >> > + *buf = NULL; > >>> >> > + if ((len = rtems_ofw_get_prop_len(node, propname)) == -1 || > >>> >> > + (len % elsz != 0)) { > >>> >> > + return -1; > >>> >> > + } > >>> >> > + > >>> >> > + if (len > 0) { > >>> >> > + *buf = malloc(len); > >>> >> > + > >>> >> > + if (rtems_ofw_get_enc_prop(node, propname, *buf, len) == -1) > { > >>> >> > + rtems_ofw_free(buf); > >>> >> > + *buf = NULL; > >>> >> > + return -1; > >>> >> > + } > >>> >> > + } > >>> >> > + > >>> >> > + return (len / elsz); > >>> >> > +} > >>> >> > + > >>> >> > +void rtems_ofw_free( void *buf ) > >>> >> > +{ > >>> >> > + free(buf); > >>> >> > +} > >>> >> > + > >>> >> > +int rtems_ofw_next_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *previous, > >>> >> > + char *buf, > >>> >> > + size_t len > >>> >> > +) > >>> >> > +{ > >>> >> > + const void *name; > >>> >> > + const void *prop; > >>> >> > + int offset; > >>> >> > + > >>> >> > + offset = rtems_fdt_phandle_to_offset(node); > >>> >> > + > >>> >> > + if (offset < 0) { > >>> >> > + return -1; > >>> >> > + } > >>> >> > + > >>> >> > + if (previous == NULL) { > >>> >> > + offset = fdt_first_property_offset(fdtp, offset); > >>> >> > + } else { > >>> >> > + fdt_for_each_property_offset(offset, fdtp, offset) { > >>> >> > + prop = fdt_getprop_by_offset(fdtp, offset, (const char > **)&name, NULL); > >>> >> > + if (prop == NULL) > >>> >> > + return -1; > >>> >> > + > >>> >> > + if (strcmp(previous, name) != 0) > >>> >> > + continue; > >>> >> > + > >>> >> > + offset = fdt_next_property_offset(fdtp, offset); > >>> >> > + break; > >>> >> > + } > >>> >> > + } > >>> >> > + > >>> >> > + if (offset < 0) > >>> >> > + return 0; > >>> >> > + > >>> >> > + prop = fdt_getprop_by_offset(fdtp, offset, (const char > **)&name, &offset); > >>> >> > + if (prop == NULL) > >>> >> > + return -1; > >>> >> > + > >>> >> > + strncpy(buf, name, len); > >>> >> > + > >>> >> > + return 1; > >>> >> > +} > >>> >> > + > >>> >> > +int rtems_ofw_set_prop( > >>> >> > + phandle_t node, > >>> >> > + const char *name, > >>> >> > + const void *buf, > >>> >> > + size_t len > >>> >> > +) > >>> >> > +{ > >>> >> > + int offset; > >>> >> > + > >>> >> > + offset = rtems_fdt_phandle_to_offset(node); > >>> >> > + > >>> >> > + if (offset < 0) > >>> >> > + return -1; > >>> >> > + > >>> >> > + if (fdt_setprop_inplace(fdtp, offset, name, buf, len) != 0) > >>> >> > + return (fdt_setprop(fdtp, offset, name, buf, len)); > >>> >> > + > >>> >> > + return 0; > >>> >> > +} > >>> >> > + > >>> >> > +phandle_t rtems_ofw_find_device( const char *path ) > >>> >> > +{ > >>> >> > + int offset; > >>> >> > + > >>> >> > + offset = fdt_path_offset(fdtp, path); > >>> >> > + if (offset < 0) > >>> >> > + return -1; > >>> >> > + > >>> >> > + return rtems_fdt_offset_to_phandle(offset); > >>> >> > +} > >>> >> > + > >>> >> > +static phandle_t rtems_ofw_get_effective_phandle( > >>> >> > + phandle_t node, > >>> >> > + phandle_t xref > >>> >> > +) > >>> >> > +{ > >>> >> > + phandle_t child; > >>> >> > + phandle_t ref; > >>> >> > + > >>> >> > + for (child = rtems_ofw_child(node); child != 0; child = > rtems_ofw_peer(child)) { > >>> >> > + ref = rtems_ofw_get_effective_phandle(child, xref); > >>> >> > + if (ref != -1) > >>> >> > + return ref; > >>> >> > + > >>> >> > + if (rtems_ofw_get_enc_prop(child, "phandle", &ref, > sizeof(ref)) == -1 && > >>> >> > + rtems_ofw_get_enc_prop(child, "ibm,phandle", &ref, > sizeof(ref)) == -1 && > >>> >> > + rtems_ofw_get_enc_prop(child, "linux,phandle", &ref, > sizeof(ref)) == -1 > >>> >> > + ) { > >>> >> > + continue; > >>> >> > + } > >>> >> > + > >>> >> > + if (ref == xref) > >>> >> > + return child; > >>> >> > + } > >>> >> > + > >>> >> > + return -1; > >>> >> > +} > >>> >> > + > >>> >> > +phandle_t rtems_ofw_node_from_xref( phandle_t xref ) > >>> >> > +{ > >>> >> > + phandle_t node; > >>> >> > + > >>> >> > + if ((node = rtems_ofw_get_effective_phandle(rtems_ofw_peer(0), > xref)) == -1) > >>> >> > + return xref; > >>> >> > + > >>> >> > + return node; > >>> >> > +} > >>> >> > + > >>> >> > +phandle_t rtems_ofw_xref_from_node( phandle_t node ) > >>> >> > +{ > >>> >> > + phandle_t ref; > >>> >> > + > >>> >> > + if (rtems_ofw_get_enc_prop(node, "phandle", &ref, > sizeof(ref)) == -1 && > >>> >> > + rtems_ofw_get_enc_prop(node, "ibm,phandle", &ref, > sizeof(ref)) == -1 && > >>> >> > + rtems_ofw_get_enc_prop(node, "linux,phandle", &ref, > sizeof(ref)) == -1) > >>> >> > + { > >>> >> > + return node; > >>> >> > + } > >>> >> > + > >>> >> > + return ref; > >>> >> > +} > >>> >> > + > >>> >> > +phandle_t rtems_ofw_instance_to_package( ihandle_t instance ) > >>> >> > +{ > >>> >> > + return rtems_ofw_node_from_xref(instance); > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_package_to_path( > >>> >> > + phandle_t node, > >>> >> > + char *buf, > >>> >> > + size_t len > >>> >> > +) > >>> >> > +{ > >>> >> > + int offset; > >>> >> > + int rv; > >>> >> > + > >>> >> > + offset = rtems_fdt_phandle_to_offset(node); > >>> >> > + > >>> >> > + rv = fdt_get_path(fdtp, offset, buf, len); > >>> >> > + if (rv != 0) > >>> >> > + return -1; > >>> >> > + > >>> >> > + return rv; > >>> >> > +} > >>> >> > + > >>> >> > +size_t rtems_ofw_instance_to_path( > >>> >> > + ihandle_t instance, > >>> >> > + char *buf, > >>> >> > + size_t len > >>> >> > +) > >>> >> > +{ > >>> >> > + int offset; > >>> >> > + int rv; > >>> >> > + > >>> >> > + offset = rtems_ofw_instance_to_package(instance); > >>> >> > + offset = rtems_fdt_phandle_to_offset(offset); > >>> >> > + > >>> >> > + rv = fdt_get_path(fdtp, offset, buf, len); > >>> >> > + if (rv != 0) > >>> >> > + return -1; > >>> >> > + > >>> >> > + return rv; > >>> >> > +} > >>> >> > + > >>> >> > +int rtems_ofw_get_reg( > >>> >> > + phandle_t node, > >>> >> > + rtems_ofw_memory_area *buf, > >>> >> > + size_t size > >>> >> > +) > >>> >> > +{ > >>> >> > + int len; > >>> >> > + int offset; > >>> >> > + int nranges; > >>> >> > + int nregs; > >>> >> > + phandle_t parent; > >>> >> > + rtems_ofw_ranges range; > >>> >> > + const rtems_ofw_ranges *ptr; > >>> >> > + > >>> >> > + len = rtems_ofw_get_enc_prop(node, "reg", (pcell_t *)buf, > size); > >>> >> > + if (len <= 0) { > >>> >> > + return len; > >>> >> > + } > >>> >> > + > >>> >> > + nregs = MIN(len, size) / sizeof(rtems_ofw_memory_area); > >>> >> > + > >>> >> > + for (parent = rtems_ofw_parent(node); parent > 0; > >>> >> > + parent = rtems_ofw_parent(parent)) { > >>> >> > + > >>> >> > + offset = rtems_fdt_phandle_to_offset(parent); > >>> >> > + ptr = fdt_getprop(fdtp, offset, "ranges", &len); > >>> >> > + > >>> >> > + if (len < 0) { > >>> >> > + break; > >>> >> > + } > >>> >> > + > >>> >> > + nranges = len / sizeof(rtems_ofw_ranges); > >>> >> > + > >>> >> > + offset = 0; > >>> >> > + for (int i=0; i < nregs; i++) { > >>> >> > + for (int j=0; j < nranges; j++) { > >>> >> > + > >>> >> > + range.parent_bus = fdt32_to_cpu(ptr[j].parent_bus); > >>> >> > + range.child_bus = fdt32_to_cpu(ptr[j].child_bus); > >>> >> > + range.size = fdt32_to_cpu(ptr[j].size); > >>> >> > + > >>> >> > + if (buf[i].start >= range.child_bus && > >>> >> > + buf[i].start < range.child_bus + range.size) { > >>> >> > + offset = range.parent_bus - range.child_bus; > >>> >> > + break; > >>> >> > + } > >>> >> > + > >>> >> > + } > >>> >> > + buf[i].start += offset; > >>> >> > + } > >>> >> > + } > >>> >> > + > >>> >> > + return nregs; > >>> >> > +} > >>> >> > + > >>> >> > +int rtems_ofw_get_interrupts( > >>> >> > + phandle_t node, > >>> >> > + rtems_vector_number *buf, > >>> >> > + size_t size > >>> >> > +) > >>> >> > +{ > >>> >> > + int rv; > >>> >> > + > >>> >> > + rv = rtems_ofw_get_enc_prop(node, "interrupts", buf, size); > >>> >> > + > >>> >> > + if (rv <= 0) { > >>> >> > + return rv; > >>> >> > + } > >>> >> > + > >>> >> > + return MIN(size, rv) / sizeof(rtems_vector_number); > >>> >> > +} > >>> >> > + > >>> >> > +bool rtems_ofw_node_status( phandle_t node ) > >>> >> > +{ > >>> >> > + int len; > >>> >> > + const char buf[10]; > >>> >> > + > >>> >> > + len = rtems_ofw_get_prop(node, "status", &buf[0], sizeof(buf)); > >>> >> > + if ((len == -1) || > >>> >> > + (strncmp(buf, "okay", MIN(5, len)) == 0) || > >>> >> > + (strncmp(buf, "ok", MIN(3, len)) == 0)) { > >>> >> > + return true; > >>> >> > + } > >>> >> > + > >>> >> > + return false; > >>> >> > +} > >>> >> > + > >>> >> > +phandle_t rtems_ofw_find_device_by_compat( const char *compat ) > >>> >> > +{ > >>> >> > + int offset; > >>> >> > + > >>> >> > + offset = fdt_node_offset_by_compatible(fdtp, -1, compat); > >>> >> > + return rtems_fdt_offset_to_phandle(offset); > >>> >> > +} > >>> >> > diff --git a/spec/build/bsps/obj.yml b/spec/build/bsps/obj.yml > >>> >> > index 8809238057..141ba25f5e 100644 > >>> >> > --- a/spec/build/bsps/obj.yml > >>> >> > +++ b/spec/build/bsps/obj.yml > >>> >> > @@ -24,6 +24,9 @@ install: > >>> >> > - bsps/include/bsp/u-boot.h > >>> >> > - bsps/include/bsp/uart-output-char.h > >>> >> > - bsps/include/bsp/utility.h > >>> >> > +- destination: ${BSP_INCLUDEDIR}/ofw > >>> >> > + source: > >>> >> > + - bsps/include/ofw/ofw.h > >>> >> > - destination: ${BSP_INCLUDEDIR}/libchip > >>> >> > source: > >>> >> > - bsps/include/libchip/am29lv160.h > >>> >> > @@ -104,4 +107,5 @@ source: > >>> >> > - bsps/shared/dev/serial/z85c30_reg.c > >>> >> > - bsps/shared/start/bootcard.c > >>> >> > - bsps/shared/rtems-version.c > >>> >> > +- bsps/shared/ofw/ofw.c > >>> >> > type: build > >>> >> > -- > >>> >> > 2.17.1 > >>> >> > >
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