diff options
Diffstat (limited to 'src/soc/amd/stoneyridge/sb_util.c')
| -rw-r--r-- | src/soc/amd/stoneyridge/sb_util.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/sb_util.c b/src/soc/amd/stoneyridge/sb_util.c index 41ebb37be2..524efc45ad 100644 --- a/src/soc/amd/stoneyridge/sb_util.c +++ b/src/soc/amd/stoneyridge/sb_util.c @@ -18,6 +18,43 @@ #include <arch/acpi.h> #include <soc/southbridge.h> +/* PM registers are accessed a byte at a time via CD6/CD7 */ +uint8_t pm_io_read8(uint8_t reg) +{ + outb(reg, PM_INDEX); + return inb(PM_DATA); +} + +uint16_t pm_io_read16(uint8_t reg) +{ + return (pm_io_read8(reg + sizeof(uint8_t)) << 8) | pm_io_read8(reg); +} + +uint32_t pm_io_read32(uint8_t reg) +{ + return (pm_io_read16(reg + sizeof(uint16_t)) << 16) | pm_io_read16(reg); +} + +void pm_io_write8(uint8_t reg, uint8_t value) +{ + outb(reg, PM_INDEX); + outb(value, PM_DATA); +} + +void pm_io_write16(uint8_t reg, uint16_t value) +{ + pm_io_write8(reg, value & 0xff); + value >>= 8; + pm_io_write8(reg + sizeof(uint8_t), value & 0xff); +} + +void pm_io_write32(uint8_t reg, uint32_t value) +{ + pm_io_write16(reg, value & 0xffff); + value >>= 16; + pm_io_write16(reg + sizeof(uint16_t), value & 0xffff); +} + /* smbus pci read/write - access registers at 0xfed80000 - currently unused */ /* smi read/write - access registers at 0xfed80200 */ |