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ACPICA: add debug dump of BIOS _OSI strings

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on boot, print out the OSI strings the BIOS uses to query the OS.

To see this output...

build with CONFIG_ACPI_DEBUG

boot with
"acpi.debug_level=4" (ACPI_LV_INFO) (enabled by default)
and
"acpi.debug_level=1" (ACPI_UTILITIES) (default is 0)

example output:

ACPI: BIOS _OSI(Windows 2001) supported
ACPI: BIOS _OSI(Windows 2001 SP1) supported
ACPI: BIOS _OSI(Windows 2001 SP2) supported
ACPI: BIOS _OSI(Windows 2006) supported
ACPI: BIOS _OSI(Linux) not-supported
ACPI: BIOS _OSI(FreeBSD) not-supported

Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown 2009-02-03 18:04:39 -05:00
parent 18e352e4a7
commit 3e0676a9b6
1 changed files with 9 additions and 12 deletions
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21
drivers/acpi/acpica/uteval.c
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@ -116,9 +116,9 @@ acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state)
return_ACPI_STATUS(AE_NO_MEMORY); return_ACPI_STATUS(AE_NO_MEMORY);
} }
/* Default return value is SUPPORTED */ /* Default return value is 0, NOT-SUPPORTED */
return_desc->integer.value = ACPI_UINT32_MAX; return_desc->integer.value = 0;
walk_state->return_desc = return_desc; walk_state->return_desc = return_desc;
/* Compare input string to static table of supported interfaces */ /* Compare input string to static table of supported interfaces */
@ -127,10 +127,8 @@ acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state)
if (!ACPI_STRCMP if (!ACPI_STRCMP
(string_desc->string.pointer, (string_desc->string.pointer,
acpi_interfaces_supported[i])) { acpi_interfaces_supported[i])) {
return_desc->integer.value = ACPI_UINT32_MAX;
/* The interface is supported */ goto done;
return_ACPI_STATUS(AE_OK);
} }
} }
@ -141,15 +139,14 @@ acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state)
*/ */
status = acpi_os_validate_interface(string_desc->string.pointer); status = acpi_os_validate_interface(string_desc->string.pointer);
if (ACPI_SUCCESS(status)) { if (ACPI_SUCCESS(status)) {
return_desc->integer.value = ACPI_UINT32_MAX;
/* The interface is supported */
return_ACPI_STATUS(AE_OK);
} }
/* The interface is not supported */ done:
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, "ACPI: BIOS _OSI(%s) %ssupported\n",
string_desc->string.pointer,
return_desc->integer.value == 0 ? "not-" : ""));
return_desc->integer.value = 0;
return_ACPI_STATUS(AE_OK); return_ACPI_STATUS(AE_OK);
} }