[S] Change in coreboot[main]: soc/amd/common/psp_smm: introduce and use send_psp_command_smm

[Felix Held (Code Review)]

Attention is currently required from: Fred Reitberger, Jason Glenesk, Matt DeVillier.

Felix Held has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/83700?usp=email )

Change subject: soc/amd/common/psp_smm: introduce and use send_psp_command_smm
......................................................................

soc/amd/common/psp_smm: introduce and use send_psp_command_smm

When sending mailbox commands to the PSP from SMM, the SMM flag needs to
be set right before sending the mailbox command and cleared right after
the command is sent. In order to not have this code duplicated, factor
it out into a function.

Signed-off-by: Felix Held 
Change-Id: I3628463dece9d11703d5a068fe7c604108b69c1f
---
M src/soc/amd/common/block/psp/psp_smm.c
1 file changed, 13 insertions(+), 6 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/00/83700/1

diff --git a/src/soc/amd/common/block/psp/psp_smm.c b/src/soc/amd/common/block/psp/psp_smm.c
index 9b130b6..bcb1c90 100644
--- a/src/soc/amd/common/block/psp/psp_smm.c
+++ b/src/soc/amd/common/block/psp/psp_smm.c
@@ -47,6 +47,17 @@
    smm_flag = 0;
 }

+static int send_psp_command_smm(u32 command, void *buffer)
+{
+	int cmd_status;
+
+	set_smm_flag();
+	cmd_status = send_psp_command(command, buffer);
+	clear_smm_flag();
+
+	return cmd_status;
+}
+
 /*
  * The MBOX_BIOS_CMD_SMM_INFO PSP mailbox command doesn't necessarily need be sent from SMM,
  * but doing so allows the linker to sort out the addresses of c2p_buffer, p2c_buffer and
@@ -83,9 +94,7 @@

printk(BIOS_DEBUG, "PSP: Notify SMM info... ");

-	set_smm_flag();
-	cmd_status = send_psp_command(MBOX_BIOS_CMD_SMM_INFO, &buffer);
-	clear_smm_flag();
+	cmd_status = send_psp_command_smm(MBOX_BIOS_CMD_SMM_INFO, &buffer);

/* buffer's status shouldn't change but report it if it does */
    psp_print_cmd_status(cmd_status, &buffer.header);
@@ -113,9 +122,7 @@

buffer->sleep_type = sleep_type;

-	set_smm_flag();
-	cmd_status = send_psp_command(MBOX_BIOS_CMD_SX_INFO, buffer);
-	clear_smm_flag();
+	cmd_status = send_psp_command_smm(MBOX_BIOS_CMD_SX_INFO, buffer);

/* buffer's status shouldn't change but report it if it does */
    psp_print_cmd_status(cmd_status, &buffer->header);