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coreboot: tiered imd

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A tiered imd allows for both small and large allocations. The
small allocations are packed into a large region. Utilizing a
tiered imd reduces internal fragmentation within the imd.

Change-Id: I0bcd6473aacbc714844815b24d77cb5c542abdd0
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8623
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
This commit is contained in:
Aaron Durbin
2015-03-24 23:14:46 -05:00
parent 20686d851c
commit cac5050623
3 changed files with 374 additions and 136 deletions
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2
src/include/cbmem.h
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@@ -58,6 +58,7 @@
#define CBMEM_ID_HOB_POINTER 0x484f4221
#define CBMEM_ID_IGD_OPREGION 0x4f444749
#define CBMEM_ID_IMD_ROOT 0xff4017ff
#define CBMEM_ID_IMD_SMALL 0x53a11439
#define CBMEM_ID_MEMINFO 0x494D454D
#define CBMEM_ID_MPTABLE 0x534d5054
#define CBMEM_ID_MRCDATA 0x4d524344
@@ -105,6 +106,7 @@ struct cbmem_id_to_name {
{ CBMEM_ID_FREESPACE, "FREE SPACE " }, \
{ CBMEM_ID_GDT, "GDT " }, \
{ CBMEM_ID_IMD_ROOT, "IMD ROOT " }, \
{ CBMEM_ID_IMD_SMALL, "IMD SMALL " }, \
{ CBMEM_ID_MEMINFO, "MEM INFO " }, \
{ CBMEM_ID_MPTABLE, "SMP TABLE " }, \
{ CBMEM_ID_MRCDATA, "MRC DATA " }, \

18
src/include/imd.h
View File

@@ -81,6 +81,18 @@ void imd_handle_init_partial_recovery(struct imd *imd);
*/
int imd_create_empty(struct imd *imd, size_t root_size, size_t entry_align);
/*
* Create an empty imd with both large and small allocations. The small
* allocations come from a fixed imd stored internally within the large
* imd. The region allocated for tracking the smaller allocations is dependent
* on the small root_size and the large entry alignment by calculating the
* number of entries within the small imd and multiplying that by the small
* entry alignment.
*/
int imd_create_tiered_empty(struct imd *imd,
size_t lg_root_size, size_t lg_entry_align,
size_t sm_root_size, size_t sm_entry_align);
/*
* Recover a previously created imd.
*/
@@ -131,9 +143,13 @@ int imd_print_entries(const struct imd *imd, const struct imd_lookup *lookup,
* NOTE: Do not directly touch any fields within this structure. An imd pointer
* is meant to be opaque, but the fields are exposed for stack allocation.
*/
struct imd {
struct imdr {
uintptr_t limit;
void *r;
};
struct imd {
struct imdr lg;
struct imdr sm;
};
#endif /* _IMD_H_ */