lib/bootmem: Prepare for OpenSBI

Add a new bootmem memory type OpenSBI.
It's similar to BL31 on aarch64.

Required for OpenSBI integration.

Change-Id: I5ceafd5a295f4284e99e12f7ea2aa4c6d1dbb188
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34140
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/include/bootmem.h

@@ -37,6 +37,7 @@ enum bootmem_type {
 	BM_MEM_NVS,		/* ACPI NVS Memory */
 	BM_MEM_UNUSABLE,	/* Unusable address space */
 	BM_MEM_VENDOR_RSVD,	/* Vendor Reserved */
+	BM_MEM_OPENSBI,		/* Risc-V OpenSBI */
 	BM_MEM_BL31,		/* Arm64 BL31 exectuable */
 	BM_MEM_TABLE,		/* Ram configuration tables are kept in */
 	/* Tags below this point are ignored for the OS table. */

src/include/program_loading.h

@@ -38,6 +38,7 @@ enum prog_type {
 	PROG_BL31,
 	PROG_BL32,
 	PROG_POSTCAR,
+	PROG_OPENSBI,
 };
 
 /*

src/include/symbols.h

@@ -56,6 +56,7 @@ DECLARE_REGION(dma_coherent)
 DECLARE_REGION(soc_registers)
 DECLARE_REGION(framebuffer)
 DECLARE_REGION(pdpt)
+DECLARE_REGION(opensbi)
 DECLARE_REGION(bl31)
 
 /*

src/lib/bootmem.c

@@ -59,6 +59,8 @@ static uint32_t bootmem_to_lb_tag(const enum bootmem_type tag)
 		return LB_MEM_UNUSABLE;
 	case BM_MEM_VENDOR_RSVD:
 		return LB_MEM_VENDOR_RSVD;
+	case BM_MEM_OPENSBI:
+		return LB_MEM_RESERVED;
 	case BM_MEM_BL31:
 		return LB_MEM_RESERVED;
 	case BM_MEM_TABLE:
@@ -147,6 +149,7 @@ static const struct range_strings type_strings[] = {
 	{ BM_MEM_UNUSABLE, "UNUSABLE" },
 	{ BM_MEM_VENDOR_RSVD, "VENDOR RESERVED" },
 	{ BM_MEM_BL31, "BL31" },
+	{ BM_MEM_OPENSBI, "OPENSBI" },
 	{ BM_MEM_TABLE, "CONFIGURATION TABLES" },
 	{ BM_MEM_RAMSTAGE, "RAMSTAGE" },
 	{ BM_MEM_PAYLOAD, "PAYLOAD" },