soc/amd/common/psp_smi_flash: add command-specific data structures

This patch is a slightly modified version of parts of CB:65523.

Document #55758 Rev. 2.04 was used as a reference.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Signed-off-by: Ritul Guru <ritul.bits@gmail.com>
Change-Id: I41efeecf9243ddbbd8dc3f842c5ce11058bb7999
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83757
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/common/block/psp/psp_smi_flash.c

@@ -4,6 +4,47 @@
 #include <types.h>
 #include "psp_def.h"
 
+enum psp_spi_id_type {
+	SMI_TARGET_NVRAM		= 0,
+	SMI_TARGET_RPMC_NVRAM		= 5,
+};
+
+struct pspv2_spi_info_request {
+	u64 target_nv_id;
+	u64 lba;
+	u64 block_size;
+	u64 num_blocks;
+} __packed;
+
+struct mbox_pspv2_cmd_spi_info {
+	struct mbox_buffer_header header;
+	struct pspv2_spi_info_request req;
+} __packed;
+
+struct pspv2_spi_read_write_request {
+	u64 target_nv_id;
+	u64 lba;
+	u64 offset;
+	u64 num_bytes;
+	u8 buffer[];
+} __packed;
+
+struct mbox_pspv2_cmd_spi_read_write {
+	struct mbox_buffer_header header;
+	struct pspv2_spi_read_write_request req;
+} __packed;
+
+struct pspv2_spi_erase_request {
+	u64 target_nv_id;
+	u64 lba;
+	u64 num_blocks;
+} __packed;
+
+struct mbox_pspv2_cmd_spi_erase {
+	struct mbox_buffer_header header;
+	struct pspv2_spi_erase_request req;
+} __packed;
+
 enum mbox_p2c_status psp_smi_spi_get_info(struct mbox_default_buffer *buffer)
 {
 	printk(BIOS_SPEW, "PSP: SPI info request\n");