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Diffstat (limited to 'src/southbridge/intel/i82801gx/i82801gx_smihandler.c')
-rw-r--r--src/southbridge/intel/i82801gx/i82801gx_smihandler.c440
1 files changed, 324 insertions, 116 deletions
diff --git a/src/southbridge/intel/i82801gx/i82801gx_smihandler.c b/src/southbridge/intel/i82801gx/i82801gx_smihandler.c
index d2826c6aca..94207d0e4d 100644
--- a/src/southbridge/intel/i82801gx/i82801gx_smihandler.c
+++ b/src/southbridge/intel/i82801gx/i82801gx_smihandler.c
@@ -19,22 +19,24 @@
* MA 02110-1301 USA
*/
+#include <types.h>
#include <arch/io.h>
#include <arch/romcc_io.h>
#include <console/console.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/smm.h>
-//#include "chip.h"
-
-// Future TODO: Move to i82801gx directory
-#include "../../../northbridge/intel/i945/ich7.h"
+#include "i82801gx.h"
+#include "i82801gx_power.h"
#define DEBUG_SMI
#define APM_CNT 0xb2
-#define APM_STS 0xb3
+#define CST_CONTROL 0x85 // 0x85 crashes the box
+#define PST_CONTROL 0x80 // 0x80 crashes the box
#define ACPI_DISABLE 0x1e
#define ACPI_ENABLE 0xe1
+#define GNVS_UPDATE 0xea
+#define APM_STS 0xb3
/* I945 */
#define SMRAM 0x9d
@@ -48,6 +50,11 @@
#define PM1_STS 0x00
#define PM1_EN 0x02
#define PM1_CNT 0x04
+#define SLP_EN (1 << 13)
+#define SLP_TYP (7 << 10)
+#define GBL_RLS (1 << 2)
+#define BM_RLD (1 << 1)
+#define SCI_EN (1 << 0)
#define PM1_TMR 0x08
#define PROC_CNT 0x10
#define LV2 0x14
@@ -56,6 +63,7 @@
#define PM2_CNT 0x20 // mobile only
#define GPE0_STS 0x28
#define GPE0_EN 0x2c
+#define PME_B0_EN (1 << 13)
#define SMI_EN 0x30
#define EL_SMI_EN (1 << 25) // Intel Quick Resume Technology
#define INTEL_USB2_EN (1 << 18) // Intel-Specific USB2 SMI logic
@@ -84,7 +92,14 @@
/* While we read PMBASE dynamically in case it changed, let's
* initialize it with a sane value
*/
-static u16 pmbase = DEFAULT_PMBASE;
+u16 pmbase = DEFAULT_PMBASE;
+
+/* GNVS needs to be updated by an 0xEA PM Trap (B2) after it has been located
+ * by coreboot.
+ */
+global_nvs_t *gnvs = (global_nvs_t *)0x0;
+void *tcg = (void *)0x0;
+void *smi1 = (void *)0x0;
/**
* @brief read and clear PM1_STS
@@ -235,7 +250,6 @@ static void dump_tco_status(u32 tco_sts)
printk_debug("\n");
}
-
/* We are using PCIe accesses for now
* 1. the chipset can do it
* 2. we don't need to worry about how we leave 0xcf8/0xcfc behind
@@ -244,12 +258,10 @@ static void dump_tco_status(u32 tco_sts)
int southbridge_io_trap_handler(int smif)
{
- global_nvs_t *gnvs = (global_nvs_t *)0xc00;
-
switch (smif) {
case 0x32:
printk_debug("OS Init\n");
- //gnvs->smif = 0;
+ gnvs->smif = 0;
break;
default:
/* Not handled */
@@ -278,141 +290,337 @@ void southbridge_smi_set_eos(void)
outb(reg8, pmbase + SMI_EN);
}
-/**
- * @brief Interrupt handler for SMI#
- *
- * @param smm_revision revision of the smm state save map
- */
-void southbridge_smi_handler(unsigned int node, smm_state_save_area_t *state_save)
+static void southbridge_smi_sleep(unsigned int node, smm_state_save_area_t *state_save)
{
u8 reg8;
- u16 pmctrl;
- u16 pm1_sts;
- u32 smi_sts, gpe0_sts, tco_sts;
+ u32 reg32;
+ u8 slp_typ;
+ /* FIXME: the power state on boot should be read from
+ * CMOS or even better from GNVS. Right now it's hard
+ * coded at compile time.
+ */
+ u8 s5pwr = MAINBOARD_POWER_ON_AFTER_FAIL;
- pmbase = pcie_read_config16(PCI_DEV(0, 0x1f, 0), 0x40) & 0xfffc;
- printk_spew("SMI#: pmbase = 0x%04x\n", pmbase);
+ /* First, disable further SMIs */
+ reg8 = inb(pmbase + SMI_EN);
+ reg8 &= ~SLP_SMI_EN;
+ outb(reg8, pmbase + SMI_EN);
- /* We need to clear the SMI status registers, or we won't see what's
- * happening in the following calls.
- */
- smi_sts = reset_smi_status();
- dump_smi_status(smi_sts);
+ /* Figure out SLP_TYP */
+ reg32 = inl(pmbase + PM1_CNT);
+ printk_spew("SMI#: SLP = 0x%08x\n", reg32);
+ slp_typ = (reg32 >> 10) & 7;
- if (smi_sts & (1 << 21)) { // MONITOR
- global_nvs_t *gnvs = (global_nvs_t *)0xc00;
- int i;
- u32 reg32;
+ /* Next, do the deed.
+ */
- reg32 = RCBA32(0x1e00); // TRSR - Trap Status Register
+ switch (slp_typ) {
+ case 0: printk_debug("SMI#: Entering S0 (On)\n"); break;
+ case 1: printk_debug("SMI#: Entering S1 (Assert STPCLK#)\n"); break;
+ case 5:
+ printk_debug("SMI#: Entering S3 (Suspend-To-RAM)\n");
+ /* Invalidate the cache before going to S3 */
+ wbinvd();
+ break;
+ case 6: printk_debug("SMI#: Entering S4 (Suspend-To-Disk)\n"); break;
+ case 7:
+ printk_debug("SMI#: Entering S5 (Soft Power off)\n");
#if 0
- /* Comment in for some useful debug */
- for (i=0; i<4; i++) {
- if (reg32 & (1 << i)) {
- printk_debug(" io trap #%d\n", i);
- }
- }
+ /* Set PME_B0_EN before going to S5 */
+ reg32 = inl(pmbase + GPE0_EN);
+ reg32 |= PME_B0_EN;
+ outl(reg32, pmbase + GPE0_EN);
#endif
- RCBA32(0x1e00) = reg32; // TRSR
+ /* Should we keep the power state after a power loss?
+ * In case the setting is "ON" or "OFF" we don't have
+ * to do anything. But if it's "KEEP" we have to switch
+ * to "OFF" before entering S5.
+ */
+ if (s5pwr == MAINBOARD_POWER_KEEP) {
+ reg8 = pcie_read_config8(PCI_DEV(0, 0x1f, 0), GEN_PMCON_3);
+ reg8 |= 1;
+ pcie_write_config8(PCI_DEV(0, 0x1f, 0), GEN_PMCON_3, reg8);
+ }
+ break;
+ default: printk_debug("SMI#: ERROR: SLP_TYP reserved\n"); break;
+ }
- reg32 = RCBA32(0x1e10);
+ /* Write back to the SLP register to cause the originally intended
+ * event again. We need to set BIT13 (SLP_EN) though to make the
+ * sleep happen.
+ */
+ outl(reg32 | SLP_EN, pmbase + PM1_CNT);
- if ((reg32 & 0xfffc) != 0x808) {
- printk_debug(" trapped io address = 0x%x\n", reg32 & 0xfffc);
- printk_debug(" AHBE = %x\n", (reg32 >> 16) & 0xf);
- printk_debug(" read/write: %s\n", (reg32 & (1 << 24)) ? "read" :
- "write");
- }
+ /* In most sleep states, the code flow of this function ends at
+ * the line above. However, if we entered sleep state S1 and wake
+ * up again, we will continue to execute code in this function.
+ */
+ reg32 = inl(pmbase + PM1_CNT);
+ if (reg32 & SCI_EN) {
+ /* The OS is not an ACPI OS, so we set the state to S0 */
+ reg32 &= ~(SLP_EN | SLP_TYP);
+ outl(reg32, pmbase + PM1_CNT);
+ }
+}
- if (!(reg32 & (1 << 24))) {
- /* Write Cycle */
- reg32 = RCBA32(0x1e18);
- printk_debug(" iotrap written data = 0x%08x\n", reg32);
+static void southbridge_smi_apmc(unsigned int node, smm_state_save_area_t *state_save)
+{
+ u32 pmctrl;
+ u8 reg8;
- }
+ /* Emulate B2 register as the FADT / Linux expects it */
- if (gnvs->smif)
- io_trap_handler(gnvs->smif); // call function smif
+ reg8 = inb(APM_CNT);
+ switch (reg8) {
+ case CST_CONTROL:
+ /* Calling this function seems to cause
+ * some kind of race condition in Linux
+ * and causes a kernel oops
+ */
+ printk_debug("C-state control\n");
+ break;
+ case PST_CONTROL:
+ /* Calling this function seems to cause
+ * some kind of race condition in Linux
+ * and causes a kernel oops
+ */
+ printk_debug("P-state control\n");
+ break;
+ case ACPI_DISABLE:
+ pmctrl = inl(pmbase + PM1_CNT);
+ pmctrl &= ~SCI_EN;
+ outl(pmctrl, pmbase + PM1_CNT);
+ printk_debug("SMI#: ACPI disabled.\n");
+ break;
+ case ACPI_ENABLE:
+ pmctrl = inl(pmbase + PM1_CNT);
+ pmctrl |= SCI_EN;
+ outl(pmctrl, pmbase + PM1_CNT);
+ printk_debug("SMI#: ACPI enabled.\n");
+ break;
+ case GNVS_UPDATE:
+ gnvs = *(global_nvs_t **)0x500;
+ tcg = *(void **)0x504;
+ smi1 = *(void **)0x508;
+ printk_debug("SMI#: Setting up structures to %p, %p, %p\n", gnvs, tcg, smi1);
+ break;
+ default:
+ printk_debug("SMI#: Unknown function APM_CNT=%02x\n", reg8);
}
+}
- if (smi_sts & (1 << 13)) { // TCO
- tco_sts = reset_tco_status();
- dump_tco_status(tco_sts);
+static void southbridge_smi_pm1(unsigned int node, smm_state_save_area_t *state_save)
+{
+ u16 pm1_sts;
- if (tco_sts & (1 << 8)) { // BIOSWR
- u8 bios_cntl;
-
- bios_cntl = pcie_read_config16(PCI_DEV(0, 0x1f, 0), 0xdc);
-
- if (bios_cntl & 1) {
- /* BWE is RW, so the SMI was caused by a
- * write to BWE, not by a write to the BIOS
- */
-
- /* This is the place where we notice someone
- * is trying to tinker with the BIOS. We are
- * trying to be nice and just ignore it. A more
- * resolute answer would be to power down the
- * box.
- */
- printk_debug("Switching back to RO\n");
- pcie_write_config32(PCI_DEV(0, 0x1f, 0), 0xdc, (bios_cntl & ~1));
- } /* No else for now? */
- }
+ pm1_sts = reset_pm1_status();
+ dump_pm1_status(pm1_sts);
+}
+
+static void southbridge_smi_gpe0(unsigned int node, smm_state_save_area_t *state_save)
+{
+ u32 gpe0_sts;
+
+ gpe0_sts = reset_gpe0_status();
+ dump_gpe0_status(gpe0_sts);
+}
+
+static void southbridge_smi_mc(unsigned int node, smm_state_save_area_t *state_save)
+{
+ u32 reg32;
+
+ reg32 = inl(pmbase + SMI_EN);
+
+ /* Are periodic SMIs enabled? */
+ if ((reg32 & MCSMI_EN) == 0)
+ return;
+
+ printk_debug("Microcontroller SMI.\n");
+}
+
+
+
+static void southbridge_smi_tco(unsigned int node, smm_state_save_area_t *state_save)
+{
+ u32 tco_sts;
+
+ tco_sts = reset_tco_status();
+
+ /* Any TCO event? */
+ if (!tco_sts)
+ return;
+
+ if (tco_sts & (1 << 8)) { // BIOSWR
+ u8 bios_cntl;
+
+ bios_cntl = pcie_read_config16(PCI_DEV(0, 0x1f, 0), 0xdc);
+
+ if (bios_cntl & 1) {
+ /* BWE is RW, so the SMI was caused by a
+ * write to BWE, not by a write to the BIOS
+ */
+
+ /* This is the place where we notice someone
+ * is trying to tinker with the BIOS. We are
+ * trying to be nice and just ignore it. A more
+ * resolute answer would be to power down the
+ * box.
+ */
+ printk_debug("Switching back to RO\n");
+ pcie_write_config32(PCI_DEV(0, 0x1f, 0), 0xdc, (bios_cntl & ~1));
+ } /* No else for now? */
+ } else if (tco_sts & (1 << 3)) { /* TIMEOUT */
+ /* Handle TCO timeout */
+ printk_debug("TCO Timeout.\n");
+ } else if (!tco_sts) {
+ dump_tco_status(tco_sts);
}
+}
+
+static void southbridge_smi_periodic(unsigned int node, smm_state_save_area_t *state_save)
+{
+ u32 reg32;
+
+ reg32 = inl(pmbase + SMI_EN);
+
+ /* Are periodic SMIs enabled? */
+ if ((reg32 & PERIODIC_EN) == 0)
+ return;
+
+ printk_debug("Periodic SMI.\n");
+}
+
+static void southbridge_smi_monitor(unsigned int node, smm_state_save_area_t *state_save)
+{
+#define IOTRAP(x) (trap_sts & (1 << x))
+ u32 trap_sts, trap_cycle;
+ u32 data, mask = 0;
+ int i;
- if (smi_sts & (1 << 8)) { // PM1
- pm1_sts = reset_pm1_status();
- dump_pm1_status(pm1_sts);
+ trap_sts = RCBA32(0x1e00); // TRSR - Trap Status Register
+ RCBA32(0x1e00) = trap_sts; // Clear trap(s) in TRSR
+
+ trap_cycle = RCBA32(0x1e10);
+ for (i=16; i<20; i++) {
+ if (trap_cycle & (1 << i))
+ mask |= (0xff << ((i - 16) << 2));
}
- if (smi_sts & (1 << 9)) { // GPE0
- gpe0_sts = reset_gpe0_status();
- dump_gpe0_status(gpe0_sts);
+
+ /* IOTRAP(3) SMI function call */
+ if (IOTRAP(3)) {
+ if (gnvs && gnvs->smif)
+ io_trap_handler(gnvs->smif); // call function smif
+ return;
}
- if (smi_sts & (1 << 5)) { // APM
- /* Emulate B2 register as the FADT / Linux expects it */
-
- reg8 = inb(0xb2);
- switch (reg8) {
- case ACPI_DISABLE:
- pmctrl = inw(pmbase + 0x04);
- pmctrl |= (1 << 0);
- outw(pmctrl, pmbase + 0x04);
- printk_debug("SMI#: ACPI disabled.\n");
- break;
- case ACPI_ENABLE:
- pmctrl = inw(pmbase + 0x04);
- pmctrl &= ~(1 << 0);
- outw(pmctrl, pmbase + 0x04);
- printk_debug("SMI#: ACPI enabled.\n");
- break;
+ /* IOTRAP(2) currently unused
+ * IOTRAP(1) currently unused */
+
+ /* IOTRAP(0) SMIC */
+ if (IOTRAP(0)) {
+ if (!(trap_cycle & (1 << 24))) { // It's a write
+ printk_debug("SMI1 command\n");
+ data = RCBA32(0x1e18);
+ data &= mask;
+ // if (smi1)
+ // southbridge_smi_command(data);
+ // return;
}
+ // Fall through to debug
}
- if (smi_sts & (1 << 4)) { // SLP_SMI
- u32 reg32;
+ printk_debug(" trapped io address = 0x%x\n", trap_cycle & 0xfffc);
+ for (i=0; i < 4; i++) if(IOTRAP(i)) printk_debug(" TRAP = %d\n", i);
+ printk_debug(" AHBE = %x\n", (trap_cycle >> 16) & 0xf);
+ printk_debug(" MASK = 0x%08x\n", mask);
+ printk_debug(" read/write: %s\n", (trap_cycle & (1 << 24)) ? "read" : "write");
- /* First, disable further SMIs */
- reg8 = inb(pmbase + SMI_EN);
- reg8 &= ~SLP_SMI_EN;
- outb(reg8, pmbase + SMI_EN);
+ if (!(trap_cycle & (1 << 24))) {
+ /* Write Cycle */
+ data = RCBA32(0x1e18);
+ printk_debug(" iotrap written data = 0x%08x\n", data);
+ }
+#undef IOTRAP
+}
- /* Next, do the deed, we should change
- * power on after power loss bits here
- * if we're going to S5
- */
+typedef void (*smi_handler)(unsigned int node,
+ smm_state_save_area_t *state_save);
+
+smi_handler southbridge_smi[32] = {
+ NULL, // [0] reserved
+ NULL, // [1] reserved
+ NULL, // [2] BIOS_STS
+ NULL, // [3] LEGACY_USB_STS
+ southbridge_smi_sleep, // [4] SLP_SMI_STS
+ southbridge_smi_apmc, // [5] APM_STS
+ NULL, // [6] SWSMI_TMR_STS
+ NULL, // [7] reserved
+ southbridge_smi_pm1, // [8] PM1_STS
+ southbridge_smi_gpe0, // [9] GPE0_STS
+ NULL, // [10] GPI_STS
+ southbridge_smi_mc, // [11] MCSMI_STS
+ NULL, // [12] DEVMON_STS
+ southbridge_smi_tco, // [13] TCO_STS
+ southbridge_smi_periodic, // [14] PERIODIC_STS
+ NULL, // [15] SERIRQ_SMI_STS
+ NULL, // [16] SMBUS_SMI_STS
+ NULL, // [17] LEGACY_USB2_STS
+ NULL, // [18] INTEL_USB2_STS
+ NULL, // [19] reserved
+ NULL, // [20] PCI_EXP_SMI_STS
+ southbridge_smi_monitor, // [21] MONITOR_STS
+ NULL, // [22] reserved
+ NULL, // [23] reserved
+ NULL, // [24] reserved
+ NULL, // [25] EL_SMI_STS
+ NULL, // [26] SPI_STS
+ NULL, // [27] reserved
+ NULL, // [28] reserved
+ NULL, // [29] reserved
+ NULL, // [30] reserved
+ NULL // [31] reserved
+};
- /* Write back to the SLP register to cause the
- * originally intended event again. We need to set BIT13
- * (SLP_EN) though to make the sleep happen.
- */
- reg32 = inl(pmbase + 0x04);
- printk_debug("SMI#: SLP = 0x%08x\n", reg32);
- printk_debug("SMI#: Powering off.\n");
- outl(reg32 | (1 << 13), pmbase + 0x04);
+/**
+ * @brief Interrupt handler for SMI#
+ *
+ * @param smm_revision revision of the smm state save map
+ */
+
+void southbridge_smi_handler(unsigned int node, smm_state_save_area_t *state_save)
+{
+ int i, dump = 0;
+ u32 smi_sts;
+
+ /* Update global variable pmbase */
+ pmbase = pcie_read_config16(PCI_DEV(0, 0x1f, 0), 0x40) & 0xfffc;
+
+ /* We need to clear the SMI status registers, or we won't see what's
+ * happening in the following calls.
+ */
+ smi_sts = reset_smi_status();
+
+ /* Filter all non-enabled SMI events */
+ // FIXME Double check, this clears MONITOR
+ // smi_sts &= inl(pmbase + SMI_EN);
+
+ /* Call SMI sub handler for each of the status bits */
+ for (i = 0; i < 31; i++) {
+ if (smi_sts & (1 << i)) {
+ if (southbridge_smi[i])
+ southbridge_smi[i](node, state_save);
+ else {
+ printk_debug("SMI_STS[%d] occured, but no "
+ "handler available.\n", i);
+ dump = 1;
+ }
+ }
+ }
+
+ if(dump) {
+ dump_smi_status(smi_sts);
}
}
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