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authorLee Leahy <leroy.p.leahy@intel.com>2015-05-08 11:33:55 -0700
committerAaron Durbin <adurbin@chromium.org>2015-05-13 17:07:51 +0200
commit522149c310ad8885cd0b58a88cacac24852a541f (patch)
tree03e5a5c6231a741aa88e1c26b8392571b5eab35d /src
parent0a50d9b35334d03f13b38e21497ba0aae8b16712 (diff)
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cbmem: Add initial allocation support
Add support to allocate a region just below CBMEM root. This region is reserved for FSP 1.1 to use for its stack and variables. BRANCH=none BUG=None TEST=Build and run on Braswell Change-Id: I1d4b36ab366e6f8e036335c56c1756f2dfaab3f5 Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com> Reviewed-on: http://review.coreboot.org/10148 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src')
-rw-r--r--src/include/cbmem.h18
-rw-r--r--src/lib/imd_cbmem.c29
2 files changed, 38 insertions, 9 deletions
diff --git a/src/include/cbmem.h b/src/include/cbmem.h
index 07e564539..08c1d647b 100644
--- a/src/include/cbmem.h
+++ b/src/include/cbmem.h
@@ -146,12 +146,30 @@ struct cbmem_entry;
*/
#define DYN_CBMEM_ALIGN_SIZE (4096)
+#define CBMEM_ROOT_SIZE DYN_CBMEM_ALIGN_SIZE
+
+/* The root region is at least DYN_CBMEM_ALIGN_SIZE . */
+#define CBMEM_ROOT_MIN_SIZE DYN_CBMEM_ALIGN_SIZE
+#define CBMEM_LG_ALIGN CBMEM_ROOT_MIN_SIZE
+
+/* Small allocation parameters. */
+#define CBMEM_SM_ROOT_SIZE 1024
+#define CBMEM_SM_ALIGN 32
+
+/* Determine the size for CBMEM root and the small allocations */
+static inline size_t cbmem_overhead_size(void)
+{
+ return 2 * CBMEM_ROOT_MIN_SIZE;
+}
/* By default cbmem is attempted to be recovered. Returns 0 if cbmem was
* recovered or 1 if cbmem had to be reinitialized. */
int cbmem_initialize(void);
+int cbmem_initialize_id_size(u32 id, u64 size);
+
/* Initialize cbmem to be empty. */
void cbmem_initialize_empty(void);
+void cbmem_initialize_empty_id_size(u32 id, u64 size);
/* Return the top address for dynamic cbmem. The address returned needs to
* be consistent across romstage and ramstage, and it is required to be
diff --git a/src/lib/imd_cbmem.c b/src/lib/imd_cbmem.c
index 0649bf3b1..fc12c2536 100644
--- a/src/lib/imd_cbmem.c
+++ b/src/lib/imd_cbmem.c
@@ -30,13 +30,6 @@
#include <arch/acpi.h>
#endif
-/* The root region is at least DYN_CBMEM_ALIGN_SIZE . */
-#define ROOT_MIN_SIZE DYN_CBMEM_ALIGN_SIZE
-#define LG_ALIGN ROOT_MIN_SIZE
-/* Small allocation parameters. */
-#define SM_ROOT_SIZE 1024
-#define SM_ALIGN 32
-
static inline struct imd *cbmem_get_imd(void)
{
/* Only supply a backing store for imd in ramstage. */
@@ -116,6 +109,11 @@ static struct imd *imd_init_backing_with_recover(struct imd *backing)
void cbmem_initialize_empty(void)
{
+ cbmem_initialize_empty_id_size(0, 0);
+}
+
+void cbmem_initialize_empty_id_size(u32 id, u64 size)
+{
struct imd *imd;
struct imd imd_backing;
@@ -127,12 +125,16 @@ void cbmem_initialize_empty(void)
printk(BIOS_DEBUG, "CBMEM:\n");
- if (imd_create_tiered_empty(imd, ROOT_MIN_SIZE, LG_ALIGN,
- SM_ROOT_SIZE, SM_ALIGN)) {
+ if (imd_create_tiered_empty(imd, CBMEM_ROOT_MIN_SIZE, CBMEM_LG_ALIGN,
+ CBMEM_SM_ROOT_SIZE, CBMEM_SM_ALIGN)) {
printk(BIOS_DEBUG, "failed.\n");
return;
}
+ /* Add the specified range first */
+ if (size)
+ cbmem_add(id, size);
+
/* Complete migration to CBMEM. */
cbmem_run_init_hooks();
}
@@ -146,6 +148,11 @@ static inline int cbmem_fail_recovery(void)
int cbmem_initialize(void)
{
+ return cbmem_initialize_id_size(0, 0);
+}
+
+int cbmem_initialize_id_size(u32 id, u64 size)
+{
struct imd *imd;
struct imd imd_backing;
@@ -167,6 +174,10 @@ int cbmem_initialize(void)
imd_lockdown(imd);
#endif
+ /* Add the specified range first */
+ if (size)
+ cbmem_add(id, size);
+
/* Complete migration to CBMEM. */
cbmem_run_init_hooks();