diff options
Diffstat (limited to 'src/southbridge/amd/agesa/hudson/smihandler.c')
| -rw-r--r-- | src/southbridge/amd/agesa/hudson/smihandler.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/southbridge/amd/agesa/hudson/smihandler.c b/src/southbridge/amd/agesa/hudson/smihandler.c index 923fd93bf0..e762d0bb96 100644 --- a/src/southbridge/amd/agesa/hudson/smihandler.c +++ b/src/southbridge/amd/agesa/hudson/smihandler.c @@ -5,12 +5,14 @@ * Subject to the GNU GPL v2, or (at your option) any later version. */ +#include "hudson.h" #include "smi.h" #include <console/console.h> #include <cpu/x86/smm.h> #include <delay.h> +#define SMI_0x88_ACPI_COMMAND (1 << 11) enum smi_source { SMI_SOURCE_SCI = (1 << 0), @@ -21,6 +23,28 @@ enum smi_source { SMI_SOURCE_0x90 = (1 << 5) }; +static void hudson_apmc_smi_handler(void) +{ + u32 reg32; + const uint8_t cmd = inb(ACPI_SMI_CTL_PORT); + + switch (cmd) { + case ACPI_SMI_CMD_ENABLE: + reg32 = inl(ACPI_PM1_CNT_BLK); + reg32 |= (1 << 0); /* SCI_EN */ + outl(reg32, ACPI_PM1_CNT_BLK); + break; + case ACPI_SMI_CMD_DISABLE: + reg32 = inl(ACPI_PM1_CNT_BLK); + reg32 &= ~(1 << 0); /* clear SCI_EN */ + outl(ACPI_PM1_CNT_BLK, reg32); + break; + } + + if (mainboard_smi_apmc) + mainboard_smi_apmc(cmd); +} + int southbridge_io_trap_handler(int smif) { return 0; @@ -62,6 +86,10 @@ static void process_smi_0x88(void) { const uint32_t status = smi_read32(0x88); + if (status & SMI_0x88_ACPI_COMMAND) { + /* Command received via ACPI SMI command port */ + hudson_apmc_smi_handler(); + } /* Clear events to prevent re-entering SMI if event isn't handled */ smi_write32(0x88, status); } |