From 430363ace7338b9708feefb5917d667f1733944d Mon Sep 17 00:00:00 2001 From: Vladimir Serbinenko Date: Sun, 2 Nov 2014 21:51:22 +0100 Subject: [PATCH] acpigen: Add new function acpigen_pop_len acpigen_patch_len doesn't really need its argument: length always includes everything from length bytes to current pointer and never bytes before it. Hence just infer all the info implicitly. Argument is wrong in several places through the codebase but ACPI parsing is lax enough to swallow incorrect SSDT. After this function is used throughout the codebase, these issues will be fixed. Change-Id: I9fa536a614c5595146a7a1cd71f2676d8a8d9c2f Signed-off-by: Vladimir Serbinenko Reviewed-on: http://review.coreboot.org/7325 Reviewed-by: Edward O'Callaghan Reviewed-by: Paul Menzel Tested-by: build bot (Jenkins) --- src/arch/x86/boot/acpigen.c | 13 +++++++++++++ src/arch/x86/include/arch/acpigen.h | 1 + 2 files changed, 14 insertions(+) diff --git a/src/arch/x86/boot/acpigen.c b/src/arch/x86/boot/acpigen.c index 222a2db284..0689273b0a 100644 --- a/src/arch/x86/boot/acpigen.c +++ b/src/arch/x86/boot/acpigen.c @@ -57,6 +57,19 @@ void acpigen_patch_len(int len) } +void acpigen_pop_len(void) +{ + int len; + ASSERT(ltop > 0) + char *p = len_stack[--ltop]; + len = gencurrent - p; + ASSERT(len <= ACPIGEN_MAXLEN) + /* generate store length for 0xfff max */ + p[0] = (0x40 | (len & 0xf)); + p[1] = (len >> 4 & 0xff); + +} + void acpigen_set_current(char *curr) { gencurrent = curr; diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h index 3217dbeca3..d9df5d016a 100644 --- a/src/arch/x86/include/arch/acpigen.h +++ b/src/arch/x86/include/arch/acpigen.h @@ -27,6 +27,7 @@ int acpigen_write_len_f(void); void acpigen_patch_len(int len); +void acpigen_pop_len(void); void acpigen_set_current(char *curr); char *acpigen_get_current(void); int acpigen_write_package(int nr_el);