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ddr: altera: Stratix10: Add multi-banks DRAM size check

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Stratix 10 maps dram from 0 to 128GB.  There is a 2GB hole
in the memory for peripherals and other IO from 2GB to 4GB.
However the dram controller ignores upper address bits for
smaller dram configurations.  Example: a 4GB dram
maps to multiple locations, every 4GB on the address.

Signed-off-by: Dalon Westergreen <dalon.westergreen@intel.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
This commit is contained in:
Ley Foon Tan 2019-03-22 01:24:01 +08:00 • committed by Marek Vasut
parent b6f7ee5d1f
commit 6cd7134e73
1 changed files with 41 additions and 5 deletions
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46
drivers/ddr/altera/sdram_s10.c
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@ -7,12 +7,14 @@
#include <common.h>
#include <errno.h>
#include <div64.h>
#include <fdtdec.h>
#include <asm/io.h>
#include <wait_bit.h>
#include <asm/arch/firewall_s10.h>
#include <asm/arch/sdram_s10.h>
#include <asm/arch/system_manager.h>
#include <asm/arch/reset_manager.h>
#include <linux/sizes.h>
DECLARE_GLOBAL_DATA_PTR;
@ -134,14 +136,35 @@ static int poll_hmc_clock_status(void)
SYSMGR_HMC_CLK_STATUS_MSK, true, 1000, false);
}
static void sdram_size_check(void)
static void sdram_size_check(bd_t *bd)
{
phys_size_t total_ram_check = 0;
phys_size_t ram_check = 0;
phys_addr_t start = 0;
int bank;
/* Sanity check ensure correct SDRAM size specified */
debug("DDR: Running SDRAM size sanity check\n");
if (get_ram_size(0, gd->ram_size) != gd->ram_size) {
for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
start = bd->bi_dram[bank].start;
while (ram_check < bd->bi_dram[bank].size) {
ram_check += get_ram_size((void *)(start + ram_check),
(phys_size_t)SZ_1G);
}
total_ram_check += ram_check;
ram_check = 0;
}
/* If the ram_size is 2GB smaller, we can assume the IO space is
* not mapped in. gd->ram_size is the actual size of the dram
* not the accessible size.
*/
if (total_ram_check != gd->ram_size) {
puts("DDR: SDRAM size check failed!\n");
hang();
}
debug("DDR: SDRAM size check passed!\n");
}
@ -155,6 +178,8 @@ int sdram_mmr_init_full(unsigned int unused)
u32 update_value, io48_value, ddrioctl;
u32 i;
int ret;
phys_size_t hw_size;
bd_t bd = {0};
/* Enable access to DDR from CPU master */
clrbits_le32(CCU_REG_ADDR(CCU_CPU0_MPRT_ADBASE_DDRREG),
@ -346,9 +371,20 @@ int sdram_mmr_init_full(unsigned int unused)
unsigned long long size = sdram_calculate_size();
/* If the size is invalid, use default Config size */
if (size <= 0)
gd->ram_size = PHYS_SDRAM_1_SIZE;
hw_size = PHYS_SDRAM_1_SIZE;
else
gd->ram_size = size;
hw_size = size;
/* Get bank configuration from devicetree */
ret = fdtdec_decode_ram_size(gd->fdt_blob, NULL, 0, NULL,
(phys_size_t *)&gd->ram_size, &bd);
if (ret) {
puts("DDR: Failed to decode memory node\n");
return -1;
}
if (gd->ram_size != hw_size)
printf("DDR: Warning: DRAM size from device tree mismatch with hardware.\n");
printf("DDR: %lld MiB\n", gd->ram_size >> 20);
@ -374,7 +410,7 @@ int sdram_mmr_init_full(unsigned int unused)
DDR_HMC_ECCCTL2_AWB_EN_SET_MSK));
}
sdram_size_check();
sdram_size_check(&bd);
debug("DDR: HMC init success\n");
return 0;