From 8ecdc9e877aec90cbc5126a4c82298a7eca89d83 Mon Sep 17 00:00:00 2001 From: Vladimir Serbinenko Date: Sat, 15 Feb 2014 18:59:40 +0100 Subject: acpigen: Add acpigen_emit_eisaid. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Ib92142a133445018cd152dabe299792ba5f36548 Signed-off-by: Vladimir Serbinenko Reviewed-on: http://review.coreboot.org/5240 Tested-by: build bot (Jenkins) Reviewed-by: Kyösti Mälkki --- src/arch/x86/boot/acpigen.c | 34 ++++++++++++++++++++++++++++++++++ src/arch/x86/include/arch/acpigen.h | 1 + 2 files changed, 35 insertions(+) (limited to 'src') diff --git a/src/arch/x86/boot/acpigen.c b/src/arch/x86/boot/acpigen.c index fdb7e02c9b..ba3d2dfe46 100644 --- a/src/arch/x86/boot/acpigen.c +++ b/src/arch/x86/boot/acpigen.c @@ -754,3 +754,37 @@ int acpigen_write_mainboard_resources(const char *scope, const char *name) acpigen_patch_len(len - 1); return len; } + +static int hex2bin(const char c) +{ + if (c >= 'A' && c <= 'F') + return c - 'A' + 10; + if (c >= 'a' && c <= 'f') + return c - 'a' + 10; + return c - '0'; +} + +int acpigen_emit_eisaid(const char *eisaid) +{ + u32 compact = 0; + + /* Clamping individual values would be better but + there is a disagreement over what is a valid + EISA id, so accept anything and don't clamp, + parent code should create a valid EISAid. + */ + compact |= (eisaid[0] - 'A' + 1) << 26; + compact |= (eisaid[1] - 'A' + 1) << 21; + compact |= (eisaid[2] - 'A' + 1) << 16; + compact |= hex2bin(eisaid[3]) << 12; + compact |= hex2bin(eisaid[4]) << 8; + compact |= hex2bin(eisaid[5]) << 4; + compact |= hex2bin(eisaid[6]); + + acpigen_emit_byte(0xc); + acpigen_emit_byte((compact >> 24) & 0xff); + acpigen_emit_byte((compact >> 16) & 0xff); + acpigen_emit_byte((compact >> 8) & 0xff); + acpigen_emit_byte(compact & 0xff); + return 5; +} diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h index 2ff996727d..3217dbeca3 100644 --- a/src/arch/x86/include/arch/acpigen.h +++ b/src/arch/x86/include/arch/acpigen.h @@ -34,6 +34,7 @@ int acpigen_write_byte(unsigned int data); int acpigen_emit_byte(unsigned char data); int acpigen_emit_stream(const char *data, int size); int acpigen_emit_namestring(const char *namepath); +int acpigen_emit_eisaid(const char *eisaid); int acpigen_write_dword(unsigned int data); int acpigen_write_qword(uint64_t data); int acpigen_write_name(const char *name); -- cgit v1.2.3