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arch/x86: Add Kconfig option for ACPI \_PR CPU name string 

Add a Kconfig option to change the \PR.CPxx name string. This
provides some flexibility when working with table not generated
by coreboot.

Change-Id: Ibc0c56783c6da80501e2177de96a414b592cb74f
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: https://review.coreboot.org/21210
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
This commit is contained in:
Marc Jones 2017-08-25 18:54:23 -06:00 committed by Martin Roth
parent 7bb0325884
commit 7a2d4ea4ee
2 changed files with 11 additions and 2 deletions
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9
src/arch/x86/Kconfig
View File

@ -249,3 +249,12 @@ config SKIP_MAX_REBOOT_CNT_CLEAR
Set to allow the payload to control normal/fallback image recovery.
Note that it is the responsibility of the payload to reset the
normal boot bit to 1 after each successsful boot.
config ACPI_CPU_STRING
string
default "\\_PR.CP%02d"
depends on HAVE_ACPI_TABLES
help
Sets the ACPI name string in the processor scope as written by
the acpigen function. Default is \_PR.CPxx. Note that you need
the \ escape character in the string.

4
src/arch/x86/acpigen.c
View File

@ -338,7 +338,7 @@ void acpigen_write_scope(const char *name)
void acpigen_write_processor(u8 cpuindex, u32 pblock_addr, u8 pblock_len)
{
/*
Processor (\_PR.CPUcpuindex, cpuindex, pblock_addr, pblock_len)
Processor (\_PR.CPcpuindex, cpuindex, pblock_addr, pblock_len)
{
*/
char pscope[16];
@ -346,7 +346,7 @@ void acpigen_write_processor(u8 cpuindex, u32 pblock_addr, u8 pblock_len)
acpigen_write_len_f();
snprintf(pscope, sizeof(pscope),
"\\_PR.CP%02d", (unsigned int) cpuindex);
CONFIG_ACPI_CPU_STRING, (unsigned int) cpuindex);
acpigen_emit_namestring(pscope);
acpigen_emit_byte(cpuindex);
acpigen_emit_dword(pblock_addr);