[coreboot-gerrit] Change in coreboot[master]: soc/amd/picasso: Use common SMM save state ops

[Arthur Heymans (Code Review)]

Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/37019 )

Change subject: soc/amd/picasso: Use common SMM save state ops
......................................................................

soc/amd/picasso: Use common SMM save state ops

Change-Id: I9eb42b9f9b14925a682356e21bbb0d2ccaeaafec
Signed-off-by: Arthur Heymans 
---
M src/soc/amd/picasso/smihandler.c
1 file changed, 24 insertions(+), 15 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/19/37019/1

diff --git a/src/soc/amd/picasso/smihandler.c b/src/soc/amd/picasso/smihandler.c
index 39c2dfd..b04eddb 100644
--- a/src/soc/amd/picasso/smihandler.c
+++ b/src/soc/amd/picasso/smihandler.c
@@ -19,7 +19,6 @@
 #include <console/console.h>
 #include <cpu/x86/smm.h>
 #include <cpu/x86/cache.h>
-#include <cpu/amd/amd64_save_state.h>
 #include <arch/acpi.h>
 #include <arch/hlt.h>
 #include <device/pci_def.h>
@@ -41,17 +40,18 @@
    	SMM_IO_TRAP_PORT_ADDRESS_MASK);
 }

-static void *find_save_state(int cmd)
+static int find_save_state_node(int cmd)
 {
    int core;
-	amd64_smm_state_save_area_t *state;
+	const struct smm_save_state_ops *ops = get_save_state_ops();
    u32 smm_io_trap;
    u8 reg_al;
+	u64 rax;

/* Check all nodes looking for the one that issued the IO */
    for (core = 0; core < CONFIG_MAX_CPUS; core++) {
-		state = smm_get_save_state(core);
-		smm_io_trap = state->smm_io_trap_offset;
+		if (ops->get_io_trap(core, &smm_io_trap))
+			continue;
    	/* Check for Valid IO Trap Word (bit1==1) */
    	if (!(smm_io_trap & SMM_IO_TRAP_VALID))
    		continue;
@@ -62,30 +62,39 @@
    	if (pm_acpi_smi_cmd_port() != get_io_address(smm_io_trap))
    		continue;
    	/* Check AL against the requested command */
-		reg_al = state->rax;
+		if (ops->get_reg(core, RAX, &rax))
+			continue;
+		reg_al = rax;
    	if (reg_al == cmd)
-			return state;
+			return core;
    }
-	return NULL;
+	return -1;
 }

static void southbridge_smi_gsmi(void)
 {
+	u32 ret, param;
    u8 sub_command;
-	amd64_smm_state_save_area_t *io_smi;
-	u32 reg_ebx;
+	int node = find_save_state_node(APM_CNT_ELOG_GSMI);
+	const struct smm_save_state_ops *ops = get_save_state_ops();

-	io_smi = find_save_state(APM_CNT_ELOG_GSMI);
-	if (!io_smi)
+	if (node < -1)
    	return;
+
    /* Command and return value in EAX */
-	sub_command = (io_smi->rax >> 8) & 0xff;
+	uint64_t reg;
+	if (ops->get_reg(node, RAX, &reg))
+		return;
+	sub_command = (u8)(reg >> 8);

/* Parameter buffer in EBX */
-	reg_ebx = io_smi->rbx;
+	if (ops->get_reg(node, RBX, &reg))
+		return;
+	param = reg & UINT32_MAX;

/* drivers/elog/gsmi.c */
-	io_smi->rax = gsmi_exec(sub_command, &reg_ebx);
+	ret = gsmi_exec(sub_command, (u32 *)param);
+	ops->set_reg(node, RAX, reg);
 }

static void sb_apmc_smi_handler(void)