coreboot: Add memory range parsing
This patch adds code to parse memory range information passed by
coreboot, and a simple helper to test whether a specific address belongs
to a range. This may be useful for coreboot-using platforms that need to
know information about the system's memory layout (e.g. to check whether
an address passed in via SMC targets valid DRAM).
Signed-off-by: Julius Werner <jwerner@chromium.org>
Change-Id: I3bea326c426db27d1a8b7d6e17418e4850e884b4
diff --git a/include/lib/coreboot.h b/include/lib/coreboot.h
index 88212c3..dda3173 100644
--- a/include/lib/coreboot.h
+++ b/include/lib/coreboot.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -19,6 +19,27 @@
} coreboot_serial_t;
extern coreboot_serial_t coreboot_serial;
+#define COREBOOT_MAX_MEMRANGES 32 /* libpayload also uses this limit */
+
+typedef struct __packed {
+ uint64_t start;
+ uint64_t size;
+ uint32_t type;
+} coreboot_memrange_t;
+extern coreboot_memrange_t coreboot_memranges[COREBOOT_MAX_MEMRANGES];
+
+typedef enum {
+ CB_MEM_NONE = 0, /* coreboot will never report this */
+ CB_MEM_RAM = 1,
+ CB_MEM_RESERVED = 2,
+ CB_MEM_ACPI = 3,
+ CB_MEM_NVS = 4,
+ CB_MEM_UNUSABLE = 5,
+ CB_MEM_VENDOR_RSVD = 6,
+ CB_MEM_TABLE = 16,
+} coreboot_memory_t;
+
+coreboot_memory_t coreboot_get_memory_type(uintptr_t address);
void coreboot_table_setup(void *base);
#endif /* COREBOOT_H */