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ACPICA: acpidump: Add support for ACPI 1.0 GUID in Linux

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For older EFI platforms, searches for the RSDP using ACPI 1.0 GUID if the
2.0 GUID search fails.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lv Zheng 2014-07-08 10:05:58 +08:00 committed by Rafael J. Wysocki
parent 8aa5e56eeb
commit 890fbfa051
1 changed files with 41 additions and 7 deletions
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48
tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
View File

@ -77,6 +77,9 @@ osl_map_table(acpi_size address,
static void osl_unmap_table(struct acpi_table_header *table);
static acpi_physical_address
osl_find_rsdp_via_efi_by_keyword(FILE * file, const char *keyword);
static acpi_physical_address osl_find_rsdp_via_efi(void);
static acpi_status osl_load_rsdp(void);
@ -415,6 +418,38 @@ acpi_os_get_table_by_index(u32 index,
return (status);
}
/******************************************************************************
*
* FUNCTION: osl_find_rsdp_via_efi_by_keyword
*
* PARAMETERS: keyword - Character string indicating ACPI GUID version
* in the EFI table
*
* RETURN: RSDP address if found
*
* DESCRIPTION: Find RSDP address via EFI using keyword indicating the ACPI
* GUID version.
*
*****************************************************************************/
static acpi_physical_address
osl_find_rsdp_via_efi_by_keyword(FILE * file, const char *keyword)
{
char buffer[80];
unsigned long long address = 0;
char format[32];
snprintf(format, 32, "%s=%s", keyword, "%llx");
fseek(file, 0, SEEK_SET);
while (fgets(buffer, 80, file)) {
if (sscanf(buffer, format, &address) == 1) {
break;
}
}
return ((acpi_physical_address) (address));
}
/******************************************************************************
*
* FUNCTION: osl_find_rsdp_via_efi
@ -430,20 +465,19 @@ acpi_os_get_table_by_index(u32 index,
static acpi_physical_address osl_find_rsdp_via_efi(void)
{
FILE *file;
char buffer[80];
unsigned long address = 0;
acpi_physical_address address = 0;
file = fopen(EFI_SYSTAB, "r");
if (file) {
while (fgets(buffer, 80, file)) {
if (sscanf(buffer, "ACPI20=0x%lx", &address) == 1) {
break;
}
address = osl_find_rsdp_via_efi_by_keyword(file, "ACPI20");
if (!address) {
address =
osl_find_rsdp_via_efi_by_keyword(file, "ACPI");
}
fclose(file);
}
return ((acpi_physical_address) (address));
return (address);
}
/******************************************************************************