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lmb: introduce a function to add memory to the lmb memory map

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Introduce a function lmb_add_memory() to add available memory to the
LMB memory map. Call this function during board init once the LMB data
structures have been initialised.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Sughosh Ganu 2024-08-26 17:29:23 +05:30 • committed by Tom Rini
parent 6942bdb42a
commit 8a9fc30f16
2 changed files with 50 additions and 0 deletions
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11
include/lmb.h
View file

@ -66,6 +66,17 @@ int lmb_init(void);
void lmb_init_and_reserve(struct bd_info *bd, void *fdt_blob);
void lmb_init_and_reserve_range(phys_addr_t base, phys_size_t size,
void *fdt_blob);
/**
* lmb_add_memory() - Add memory range for LMB allocations
*
* Add the entire available memory range to the pool of memory that
* can be used by the LMB module for allocations.
*
* Return: None
*/
void lmb_add_memory(void);
long lmb_add(phys_addr_t base, phys_size_t size);
long lmb_reserve(phys_addr_t base, phys_size_t size);
/**

39
lib/lmb.c
View file

@ -246,6 +246,43 @@ void lmb_init_and_reserve_range(phys_addr_t base, phys_size_t size,
lmb_reserve_common(fdt_blob);
}
/**
* lmb_add_memory() - Add memory range for LMB allocations
*
* Add the entire available memory range to the pool of memory that
* can be used by the LMB module for allocations.
*
* Return: None
*/
void lmb_add_memory(void)
{
int i;
phys_size_t size;
phys_addr_t rgn_top;
u64 ram_top = gd->ram_top;
struct bd_info *bd = gd->bd;
/* Assume a 4GB ram_top if not defined */
if (!ram_top)
ram_top = 0x100000000ULL;
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
size = bd->bi_dram[i].size;
if (size) {
if (bd->bi_dram[i].start > ram_top)
continue;
rgn_top = bd->bi_dram[i].start +
bd->bi_dram[i].size;
if (rgn_top > ram_top)
size -= rgn_top - ram_top;
lmb_add(bd->bi_dram[i].start, size);
}
}
}
static long lmb_resize_regions(struct alist *lmb_rgn_lst,
unsigned long idx_start,
phys_addr_t base, phys_size_t size)
@ -696,6 +733,8 @@ int lmb_init(void)
return ret;
}
lmb_add_memory();
return 0;
}