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| author | Vladimir Serbinenko <phcoder@gmail.com> | 2014-02-15 18:57:17 +0100 |
|---|---|---|
| committer | Vladimir Serbinenko <phcoder@gmail.com> | 2014-05-25 15:59:46 +0200 |
| commit | 20ea04034dd1d2a1660e6d5fc9f5e8bc6c7859f4 (patch) | |
| tree | 47c1202d3e60575b38ce620e5afec8882b41cc50 /src/arch/x86/boot | |
| parent | a31a838cdb22c827b8afe5b1620eedffa4ad4f0e (diff) | |
| download | coreboot-20ea04034dd1d2a1660e6d5fc9f5e8bc6c7859f4.tar.xz | |
acpigen: Add acpigen_write_irq.
Change-Id: Iba52dc2d52b7ac9a65d1d17b43e7204f5ede373e
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/5241
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 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/arch/x86/boot/acpigen.c b/src/arch/x86/boot/acpigen.c index 6496d759de..fdb7e02c9b 100644 --- a/src/arch/x86/boot/acpigen.c +++ b/src/arch/x86/boot/acpigen.c @@ -623,6 +623,21 @@ int acpigen_write_register(acpi_addr_t *addr) return 15; } +int acpigen_write_irq(u16 mask) +{ + /* + * acpi 3.0b section 6.4.2.1: IRQ Descriptor + * Byte 0: + * Bit7 : 0 => small item + * Bit6-3: 0100 (0x4) => IRQ port descriptor + * Bit2-0: 010 (0x2) => 2 Bytes long + */ + acpigen_emit_byte(0x22); + acpigen_emit_byte(mask & 0xff); + acpigen_emit_byte((mask >> 8) & 0xff); + return 3; +} + int acpigen_write_io16(u16 min, u16 max, u8 align, u8 len, u8 decode16) { /* |