diff options
author | Vladimir Serbinenko <phcoder@gmail.com> | 2014-02-15 18:59:40 +0100 |
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committer | Vladimir Serbinenko <phcoder@gmail.com> | 2014-06-01 01:24:53 +0200 |
commit | 8ecdc9e877aec90cbc5126a4c82298a7eca89d83 (patch) | |
tree | f4c95ef158e02ac8e49e30e4bc7f158c509294ef /src/arch/x86/boot | |
parent | 4b10bb7c807bf60674ff2d4c5494164d7869971a (diff) |
acpigen: Add acpigen_emit_eisaid.
Change-Id: Ib92142a133445018cd152dabe299792ba5f36548
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/5240
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Diffstat (limited to 'src/arch/x86/boot')
-rw-r--r-- | src/arch/x86/boot/acpigen.c | 34 |
1 files changed, 34 insertions, 0 deletions
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; +} |