>> Hello,
>> pmbase_value = pci_read_long(LPCBridge, 0x40);
>
>This neads to read
>
>pmbase_value = pci_read_long(LPCBridge, 0x40) & 0xfffffffe ;
>
>I have not checked the data sheets but I would bet the lowest bit is
>enable.
>From datasheet ICH3M, according to PMBASE:
31:16 -- reserved
15:7 -- Base address
6:1 -- reserved
0 -- Resource Indicator -- RO. tied to 1 to indicate I/O space
Should it be
pmbase_value = pci_read_long(LPCBridge, 0x40) & 0xff80;
?
Is shifting necessary, too (see attached file)?
On my machine, output from my variant:
Extracted address from PMBASE: 0x00000800
Offset to SMI_EN (PMBASE + 0x30): 0x00000830
Offset to SMI_STS (PMBASE + 0x34): 0x00000834
Value in SMI_EN: 0xffffffff
Value in SMI_STS: 0xffffffff
Output from Stefans variant:
the same as from above
Output from my variant with shift:
Extracted address from PMBASE: 0x00000010
Offset to SMI_EN (PMBASE + 0x30): 0x00000040
Offset to SMI_STS (PMBASE + 0x34): 0x00000044
Value in SMI_EN: 0x00000801
Value in SMI_STS: 0x00000010
Output from Stefans variant with shift:
the same as from above
Which of these four variants is correct?
Regards
Andon
---------------------------------
Building a website is a piece of cake.
Yahoo! Small Business gives you all the tools to get online.#include <stdio.h>
#include <pci/pci.h>
int main(void) {
struct pci_access *pacc;
struct pci_dev *LPCBridge;
u32 pmbase_value, smi_en_offset, smi_sts_offset, smi_en_value, smi_sts_value;
pacc = pci_alloc();
pci_init(pacc);
LPCBridge = pci_get_dev(pacc, 0, 0, 0x1f, 0);
//pmbase_value = pci_read_long(LPCBridge, 0x40) & 0xff80; /* my variant */
//pmbase_value = pci_read_long(LPCBridge, 0x40) & 0xfffffffe; /* Stefans variant */
//pmbase_value = (pci_read_long(LPCBridge, 0x40) & 0xff80) >> 7; /* my variant with shift */
pmbase_value = (pci_read_long(LPCBridge, 0x40) & 0xfffffffe) >> 7; /* Stefans variant with shift */
printf("Extracted address from PMBASE: 0x%08x\n", pmbase_value);
smi_en_offset = pmbase_value + 0x30;
smi_sts_offset = pmbase_value + 0x34;
printf("Offset to SMI_EN (PMBASE + 0x30): 0x%08x\n", smi_en_offset);
printf("Offset to SMI_STS (PMBASE + 0x34): 0x%08x\n", smi_sts_offset);
smi_en_value = pci_read_long(LPCBridge, smi_en_offset);
smi_sts_value = pci_read_long(LPCBridge, smi_sts_offset);
printf("Value in SMI_EN: 0x%08x\n", smi_en_value);
printf("Value in SMI_STS: 0x%08x\n", smi_sts_value);
return 0;
}
--
linuxbios mailing list
[email protected]
http://www.linuxbios.org/mailman/listinfo/linuxbios
