Hello,
Mike Kelly, le ven. 09 oct. 2026 08:15:19 +0100, a ecrit:
> The RSDP cannot be found by searching the traditional BIOS memory
> locations. Try instead to acquire the EFI System table physical
> address from Mach and search its configuration table for the RSDP.
> ---
> debian/patches/acpi-init-files.diff | 177 ++++++++++++++++++++++++++--
> 1 file changed, 168 insertions(+), 9 deletions(-)
>
> diff --git a/debian/patches/acpi-init-files.diff
> b/debian/patches/acpi-init-files.diff
> index f817cba..c3f752a 100644
> --- a/debian/patches/acpi-init-files.diff
> +++ b/debian/patches/acpi-init-files.diff
> @@ -1,8 +1,6 @@
> -Index: libacpica/acpi_init.c
> -===================================================================
> --- /dev/null
> -+++ libacpica/acpi_init.c
> -@@ -0,0 +1,1050 @@
> ++++ b/acpi_init.c
> +@@ -0,0 +1,1213 @@
> +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
> +#include <acpi/acpi.h>
> +
> @@ -29,6 +27,12 @@ Index: libacpica/acpi_init.c
> +#include <hurd.h>
> +#include <pciaccess.h>
> +#include <hurd/irqhelp.h>
> ++#ifdef __x86_64__
> ++#include <mach/host_info.h>
> ++#endif /* __x86_64__ */
> ++
> ++/* libacpica uses 0 as an 'invalid' address. */
> ++#define ACPI_INVALID_PHYSADDR 0
> +
> +#define ACPI_MAX_TABLES 128
> +
> @@ -171,12 +175,169 @@ Index: libacpica/acpi_init.c
> + return AE_OK;
> +}
> +
> ++#ifdef __x86_64__
> ++static error_t
> ++acpi_mach_efi_root (acpi_physical_address *pa)
> ++{
> ++ mach_msg_type_number_t size = HOST_EFI_SYSTAB_COUNT;
> ++ host_efi_systab_data_t systab;
> ++
> ++ if (host_info (mach_host_self (), HOST_EFI_SYSTAB,
Please use #ifdef/#else so this can be compiled against older gnumach
headers and just gracefully fail. Otherwise that will put a dependency
that can be easily avoided.
Samuel
> ++ (host_info_t) &systab, &size)
> ++ || systab == HOST_NO_UEFI)
> ++ return ENODEV;
> ++
> ++ *pa = systab;
> ++
> ++ return 0;
> ++}
> ++
> ++struct efi_table_header
> ++{
> ++ uint64_t signature;
> ++ uint32_t revision;
> ++ uint32_t size;
> ++ uint32_t crc32;
> ++ uint32_t reserved;
> ++};
> ++
> ++typedef uint64_t efi_pa_t;
> ++typedef uint64_t efi_handle_t;
> ++typedef uint8_t efi_guid_t[16];
> ++
> ++struct efi_system_table64
> ++{
> ++ struct efi_table_header hdr;
> ++
> ++ efi_pa_t fw_vendor_pa;
> ++ uint32_t fw_revision;
> ++ uint32_t pad1;
> ++ efi_handle_t con_in_handle;
> ++ efi_pa_t con_in;
> ++ efi_handle_t con_out_handle;
> ++ efi_pa_t con_out;
> ++ efi_handle_t stderr_handle;
> ++ efi_pa_t stderr;
> ++ efi_pa_t runtime;
> ++ efi_pa_t boottime;
> ++ uint32_t nr_tables;
> ++ uint32_t pad2;
> ++ efi_pa_t tables;
> ++};
> ++
> ++struct efi_config_table64
> ++{
> ++ efi_guid_t guid;
> ++ efi_pa_t table;
> ++};
> ++
> ++static const efi_guid_t acpi0_table_guid = {
> ++ 0x30, 0x2d, 0x9d, 0xeb,
> ++ 0x88, 0x2d,
> ++ 0xd3, 0x11,
> ++ 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d
> ++};
> ++
> ++static const efi_guid_t acpi2_table_guid = {
> ++ 0x71, 0xe8, 0x68, 0x88,
> ++ 0xf1, 0xe4,
> ++ 0xd3, 0x11,
> ++ 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81
> ++};
> ++
> ++#define EFI_SYSTEM_TABLE_SIGNATURE 0x5453595320494249ULL
> ++
> ++static uint64_t
> ++acpi_root_pointer_from_efi (void)
> ++{
> ++ uint64_t result = ACPI_INVALID_PHYSADDR;
> ++ uint64_t efi_system;
> ++
> ++ if (acpi_mach_efi_root (&efi_system))
> ++ return result;
> ++
> ++ struct efi_system_table64 *efi_ptr = (struct efi_system_table64 *)
> ++ acpi_os_map_memory (efi_system, sizeof (struct efi_system_table64));
> ++
> ++ if (efi_ptr == MAP_FAILED)
> ++ return result;
> ++
> ++ if (efi_ptr->hdr.signature == EFI_SYSTEM_TABLE_SIGNATURE
> ++ && efi_ptr->nr_tables > 0)
> ++ {
> ++ const acpi_size ct_sz = (sizeof (struct efi_system_table64) *
> efi_ptr->nr_tables);
> ++ struct efi_config_table64 *config_tables =
> ++ (struct efi_config_table64 *)acpi_os_map_memory (efi_ptr->tables,
> ct_sz);
> ++
> ++ if (config_tables != MAP_FAILED)
> ++ {
> ++ for (unsigned int i = 0; i < efi_ptr->nr_tables; i++)
> ++ {
> ++ if (memcmp (&config_tables->guid,
> ++ &acpi2_table_guid,
> ++ sizeof(efi_guid_t)) == 0)
> ++ {
> ++ result = config_tables->table;
> ++ /* Higher versions are preferred. */
> ++ break;
> ++ }
> ++ else if (memcmp (&config_tables->guid,
> ++ &acpi0_table_guid,
> ++ sizeof(efi_guid_t)) == 0)
> ++ {
> ++ result = config_tables->table;
> ++ }
> ++
> ++ config_tables++;
> ++ }
> ++
> ++ acpi_os_unmap_memory (config_tables, ct_sz);
> ++ }
> ++ }
> ++
> ++ acpi_os_unmap_memory (efi_ptr, sizeof(struct efi_system_table64));
> ++
> ++ if (result != ACPI_INVALID_PHYSADDR)
> ++ {
> ++ struct acpi_rsdp_common *rsdp_ptr = (struct acpi_rsdp_common *)
> ++ acpi_os_map_memory (result, sizeof (struct acpi_rsdp_common));
> ++
> ++ if (rsdp_ptr == MAP_FAILED)
> ++ {
> ++ result = ACPI_INVALID_PHYSADDR;
> ++ }
> ++ else
> ++ {
> ++ if (memcmp (rsdp_ptr->signature,
> ++ ACPI_SIG_RSDP,
> ++ sizeof(rsdp_ptr->signature)))
> ++ {
> ++ result = ACPI_INVALID_PHYSADDR;
> ++ }
> ++
> ++ acpi_os_unmap_memory (rsdp_ptr, sizeof(struct acpi_rsdp_common));
> ++ }
> ++ }
> ++
> ++ return result;
> ++}
> ++#endif /* __x86_64__ */
> ++
> +acpi_physical_address
> +acpi_os_get_root_pointer(void)
> +{
> -+ acpi_physical_address pa;
> ++ acpi_physical_address pa = ACPI_INVALID_PHYSADDR;
> ++
> ++#ifdef __x86_64__
> ++ uint64_t rsdp = acpi_root_pointer_from_efi ();
> ++
> ++ if (rsdp != ACPI_INVALID_PHYSADDR)
> ++ pa = rsdp;
> ++#endif /* __x86_64__ */
> ++
> ++ if (pa == ACPI_INVALID_PHYSADDR)
> ++ acpi_find_root_pointer(&pa);
> +
> -+ acpi_find_root_pointer(&pa);
> + return pa;
> +}
> +
> @@ -1053,10 +1214,8 @@ Index: libacpica/acpi_init.c
> +die:
> + acpi_os_printf("OUCH!\n");
> +}
> -Index: libacpica/include/acpi/acpi_init.h
> -===================================================================
> --- /dev/null
> -+++ libacpica/include/acpi/acpi_init.h
> ++++ b/include/acpi/acpi_init.h
> @@ -0,0 +1,11 @@
> +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
> +#ifndef ACPI_INIT_H_
> --
> 2.47.3
>
>
--
Samuel
> No manual is ever necessary.
May I politely interject here: BULLSHIT. That's the biggest Apple lie of all!
(Discussion in comp.os.linux.misc on the intuitiveness of interfaces.)
