Migrate 206ax to SMM_MODULES

This gets rid of ugly tseg_relocate for bd82x6x.

This is backport of 29ffa54969414b833de5c61b507b061f920d650b to bd82x6x.

Change-Id: I0f52540851ce8a7edaac257a2aa83d543bb5e530
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/10351
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 18 insertions, 81 deletions

diff --git a/src/southbridge/intel/bd82x6x/smi.c b/src/southbridge/intel/bd82x6x/smi.c
index b60c3648ff..59a9c012e5 100644
--- a/src/southbridge/intel/bd82x6x/smi.c
+++ b/src/southbridge/intel/bd82x6x/smi.c
@@ -28,10 +28,6 @@
 #include <cpu/x86/smm.h>
 #include <string.h>
 #include "pch.h"
-#include "northbridge/intel/sandybridge/sandybridge.h"
-
-extern unsigned char _binary_smm_start;
-extern unsigned char _binary_smm_end;
 
 /* While we read PMBASE dynamically in case it changed, let's
  * initialize it with a sane value
@@ -228,15 +224,18 @@ static void smi_set_eos(void)
 	outb(reg8, pmbase + SMI_EN);
 }
 
-extern uint8_t smm_relocation_start, smm_relocation_end;
-
-static void smm_relocate(void)
+void southbridge_smm_init(void)
 {
 	u32 smi_en;
 	u16 pm1_en;
 	u32 gpe0_en;
 
-	printk(BIOS_DEBUG, "Initializing SMM handler...");
+#if CONFIG_ELOG
+	/* Log events from chipset before clearing */
+	pch_log_state();
+#endif
+
+	printk(BIOS_DEBUG, "Initializing southbridge SMI...");
 
 	pmbase = pci_read_config32(dev_find_slot(0, PCI_DEVFN(0x1f, 0)),
 							PMBASE) & 0xff80;
@@ -249,10 +248,6 @@ static void smm_relocate(void)
 		return;
 	}
 
-	/* copy the SMM relocation code */
-	memcpy((void *)0x38000, &smm_relocation_start,
-			&smm_relocation_end - &smm_relocation_start);
-
 	printk(BIOS_DEBUG, "\n");
 	dump_smi_status(reset_smi_status());
 	dump_pm1_status(reset_pm1_status());
@@ -301,7 +296,10 @@ static void smm_relocate(void)
 	smi_en |= EOS | GBL_SMI_EN;
 
 	outl(smi_en, pmbase + SMI_EN);
+}
 
+void southbridge_trigger_smi(void)
+{
 	/**
 	 * There are several methods of raising a controlled SMI# via
 	 * software, among them:
@@ -320,79 +318,18 @@ static void smm_relocate(void)
 	outb(0x00, 0xb2);
 }
 
-static int smm_handler_copied = 0;
-
-static void smm_install(void)
+void southbridge_clear_smi_status(void)
 {
-	device_t dev = dev_find_slot(0, PCI_DEVFN(0, 0));
-	u32 smm_base = 0xa0000;
-	struct ied_header ied = {
-		.signature = "INTEL RSVD",
-		.size = IED_SIZE,
-		.reserved = {0},
-	};
-
-	/* The first CPU running this gets to copy the SMM handler. But not all
-	 * of them.
-	 */
-	if (smm_handler_copied)
-		return;
-	smm_handler_copied = 1;
-
-	/* enable the SMM memory window */
-	pci_write_config8(dev, SMRAM, D_OPEN | G_SMRAME | C_BASE_SEG);
-
-#if CONFIG_SMM_TSEG
-	smm_base = pci_read_config32(dev, TSEG) & ~1;
-#endif
-
-	/* copy the real SMM handler */
-	printk(BIOS_DEBUG, "Installing SMM handler to 0x%08x\n", smm_base);
-	memcpy((void *)smm_base, &_binary_smm_start,
-	       (size_t)(&_binary_smm_end - &_binary_smm_start));
-
-	/* copy the IED header into place */
-	if (CONFIG_SMM_TSEG_SIZE > IED_SIZE) {
-		/* Top of TSEG region */
-		smm_base += CONFIG_SMM_TSEG_SIZE - IED_SIZE;
-		printk(BIOS_DEBUG, "Installing IED header to 0x%08x\n",
-		       smm_base);
-		memcpy((void *)smm_base, &ied, sizeof(ied));
-	}
-	wbinvd();
-
-	/* close the SMM memory window and enable normal SMM */
-	pci_write_config8(dev, SMRAM, G_SMRAME | C_BASE_SEG);
-}
-
-void smm_init(void)
-{
-#if CONFIG_ELOG
-	/* Log events from chipset before clearing */
-	pch_log_state();
-#endif
-
-	/* Put SMM code to 0xa0000 */
-	smm_install();
-
-	/* Put relocation code to 0x38000 and relocate SMBASE */
-	smm_relocate();
-
-	/* We're done. Make sure SMIs can happen! */
+	/* Clear SMI status */
+	reset_smi_status();
+ 
+	/* Clear PM1 status */
+	reset_pm1_status();
+ 
+	/* Set EOS bit so other SMIs can occur. */
 	smi_set_eos();
 }
 
-void smm_lock(void)
-{
-	/* LOCK the SMM memory window and enable normal SMM.
-	 * After running this function, only a full reset can
-	 * make the SMM registers writable again.
-	 */
-	printk(BIOS_DEBUG, "Locking SMM.\n");
-	pci_write_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), SMRAM,
-			D_LCK | G_SMRAME | C_BASE_SEG);
-}
-
 void smm_setup_structures(void *gnvs, void *tcg, void *smi1)
 {
 	/*