util/amdfwtool: Add option for setting PSP/FW shared memory location

This tells the PSP where in main memory to copy the vboot workbuf.

BUG=b:152576063
TEST=Build sharedmem destination into AMDFW, verify shared memory
gets placed at that location.

Signed-off-by: Martin Roth <martin@coreboot.org>
Original-Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Change-Id: Ie1e955e22632ca5cf146ac6eec0407091e81f519
Original-Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/2148830
Original-Reviewed-by: Simon Glass <sjg@chromium.org>
Change-Id: Id324403afa6d5a5a65ce4709be31e7f16e038da0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42044
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/amdfwtool/amdfwtool.c

@@ -213,6 +213,8 @@ static void usage(void)
 	printf("                               and must a multiple of 1024\n");
 	printf("-l | --location                Location of Directory\n");
 	printf("-q | --anywhere                Use any 64-byte aligned addr for Directory\n");
+	printf("-R | --sharedmem               Location of PSP/FW shared memory\n");
+	printf("-P | --sharedmem-size          Maximum size of the PSP/FW shared memory area\n");
 	printf("-h | --help                    show this help\n");
 }
 
@@ -226,6 +228,7 @@ typedef enum _amd_bios_type {
 	AMD_BIOS_UCODE = 0x66,
 	AMD_BIOS_APCB_BK = 0x68,
 	AMD_BIOS_MP2_CFG = 0x6a,
+	AMD_BIOS_PSP_SHARED_MEM = 0x6b,
 	AMD_BIOS_L2_PTR =  0x70,
 	AMD_BIOS_INVALID,
 } amd_bios_type;
@@ -396,6 +399,7 @@ static amd_bios_entry amd_bios_table[] = {
 	{ .type = AMD_BIOS_UCODE, .inst = 1, .level = BDT_LVL2 },
 	{ .type = AMD_BIOS_UCODE, .inst = 2, .level = BDT_LVL2 },
 	{ .type = AMD_BIOS_MP2_CFG, .level = BDT_LVL2 },
+	{ .type = AMD_BIOS_PSP_SHARED_MEM, .inst = 0, .level = BDT_BOTH },
 	{ .type = AMD_BIOS_INVALID },
 };
 
@@ -481,7 +485,7 @@ typedef struct _bios_directory_table {
 	bios_directory_entry entries[];
 } bios_directory_table;
 
-#define MAX_BIOS_ENTRIES 0x2e
+#define MAX_BIOS_ENTRIES 0x2f
 
 typedef struct _context {
 	char *rom;		/* target buffer, size of flash device */
@@ -865,7 +869,8 @@ static void integrate_bios_firmwares(context *ctx,
 				fw_table[i].type != AMD_BIOS_APOB &&
 				fw_table[i].type != AMD_BIOS_APOB_NV &&
 				fw_table[i].type != AMD_BIOS_L2_PTR &&
-				fw_table[i].type != AMD_BIOS_BIN))
+				fw_table[i].type != AMD_BIOS_BIN &&
+				fw_table[i].type != AMD_BIOS_PSP_SHARED_MEM))
 			continue;
 
 		/* BIOS Directory items may have additional requirements */
@@ -915,6 +920,11 @@ static void integrate_bios_firmwares(context *ctx,
 			}
 		}
 
+		/* PSP_SHARED_MEM needs a destination and size */
+		if (fw_table[i].type == AMD_BIOS_PSP_SHARED_MEM &&
+				(!fw_table[i].dest || !fw_table[i].size))
+			continue;
+
 		biosdir->entries[count].type = fw_table[i].type;
 		biosdir->entries[count].region_type = fw_table[i].region_type;
 		biosdir->entries[count].dest = fw_table[i].dest ?
@@ -974,6 +984,11 @@ static void integrate_bios_firmwares(context *ctx,
 
 			ctx->current = ALIGN(ctx->current + bytes, 0x100U);
 			break;
+		case AMD_BIOS_PSP_SHARED_MEM:
+			biosdir->entries[count].dest = fw_table[i].dest;
+			biosdir->entries[count].size = fw_table[i].size;
+			break;
+
 		default: /* everything else is copied from input */
 			if (fw_table[i].type == AMD_BIOS_APCB ||
 					fw_table[i].type == AMD_BIOS_APCB_BK)
@@ -1023,8 +1038,8 @@ static void integrate_bios_firmwares(context *ctx,
 
 	fill_dir_header(biosdir, count, cookie);
 }
-// Unused values: CDEPR
+// Unused values: CDE
-static const char *optstring  = "x:i:g:AMS:p:b:s:r:k:c:n:d:t:u:w:m:T:z:J:B:K:L:Y:N:UW:I:a:Q:V:e:v:j:y:G:O:X:F:H:o:f:l:hZ:q";
+static const char *optstring  = "x:i:g:AMS:p:b:s:r:k:c:n:d:t:u:w:m:T:z:J:B:K:L:Y:N:UW:I:a:Q:V:e:v:j:y:G:O:X:F:H:o:f:l:hZ:qR:P:";
 
 static struct option long_options[] = {
 	{"xhci",             required_argument, 0, 'x' },
@@ -1076,6 +1091,8 @@ static struct option long_options[] = {
 	{"flashsize",        required_argument, 0, 'f' },
 	{"location",         required_argument, 0, 'l' },
 	{"anywhere",         no_argument,       0, 'q' },
+	{"sharedmem",        required_argument, 0, 'R' },
+	{"sharedmem-size",   required_argument, 0, 'P' },
 	{"help",             no_argument,       0, 'h' },
 	{NULL,               0,                 0,  0  }
 };
@@ -1399,6 +1416,16 @@ int main(int argc, char **argv)
 		case 'q':
 			any_location = 1;
 			break;
+		case 'R':
+			/* shared memory destination */
+			register_fw_addr(AMD_BIOS_PSP_SHARED_MEM, 0, optarg, 0);
+			sub = instance = 0;
+			break;
+		case 'P':
+			/* shared memory size */
+			register_fw_addr(AMD_BIOS_PSP_SHARED_MEM, NULL, NULL, optarg);
+			sub = instance = 0;
+			break;
 
 		case 'h':
 			usage();