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zynqmp: Do not place u-boot to reserved memory location

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TF-A and SecureOS can allocate the part of DDR for self but U-Boot is not
handling this configuration that the part of memory is reserved and
shouldn't be used by U-Boot. That's why read all reserved memory locations
and don't use it.
The code was taken from commit 4a1b975dac ("board: stm32mp1: reserve
memory for OP-TEE in device tree") and commit 1419e5b516 ("stm32mp:
update MMU config before the relocation") which is used by stm32 and does
the job properly.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2021-05-31 11:03:19 +02:00
parent 43ef4c82fe
commit ce39ee28ec
1 changed files with 21 additions and 0 deletions
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21
board/xilinx/zynqmp/zynqmp.c
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@ -11,6 +11,8 @@
#include <env.h>
#include <env_internal.h>
#include <init.h>
#include <image.h>
#include <lmb.h>
#include <log.h>
#include <net.h>
#include <sata.h>
@ -453,6 +455,25 @@ int dram_init(void)
return 0;
}
ulong board_get_usable_ram_top(ulong total_size)
{
phys_size_t size;
phys_addr_t reg;
struct lmb lmb;
/* found enough not-reserved memory to relocated U-Boot */
lmb_init(&lmb);
lmb_add(&lmb, gd->ram_base, gd->ram_size);
boot_fdt_add_mem_rsv_regions(&lmb, (void *)gd->fdt_blob);
size = ALIGN(CONFIG_SYS_MALLOC_LEN + total_size, MMU_SECTION_SIZE),
reg = lmb_alloc(&lmb, size, MMU_SECTION_SIZE);
if (!reg)
reg = gd->ram_top - size;
return reg + size;
}
#else
int dram_init_banksize(void)
{