summaryrefslogtreecommitdiff
path: root/board/freescale
diff options
context:
space:
mode:
authorMarek Vasut <marex@denx.de>2014-03-28 08:30:59 +0100
committerStefano Babic <sbabic@denx.de>2014-03-31 18:28:51 +0200
commit31c832f93c6d6c8febe010e1dafd3041b5359765 (patch)
tree421dff6bcbfd9bcc9386748c7e05ec54507ed2b4 /board/freescale
parentf79a023f411882d160df57b45709a7652e8c241e (diff)
downloadu-boot-imx-31c832f93c6d6c8febe010e1dafd3041b5359765.zip
u-boot-imx-31c832f93c6d6c8febe010e1dafd3041b5359765.tar.gz
u-boot-imx-31c832f93c6d6c8febe010e1dafd3041b5359765.tar.bz2
arm: mx5: Avoid hardcoding memory sizes on MX53QSB
The DRAM size can be easily detected at runtime on i.MX53. Implement such detection on MX53QSB and adjust the rest of the macros accordingly to use the detected values. An important thing to note here is that we had to override the function for trimming the effective DRAM address, get_effective_memsize(). That is because the function uses CONFIG_MAX_MEM_MAPPED as the upper bound of the available DRAM and we don't have gd->bd->bi_dram[0].size set up at the time the function is called, thus we cannot put this into the macro CONFIG_MAX_MEM_MAPPED . Instead, we use custom override where we use the size of the first DRAM block which we just detected. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Fabio Estevam <fabio.estevam@freescale.com> Cc: Stefano Babic <sbabic@denx.de> Cc: Wolfgang Denk <wd@denx.de>
Diffstat (limited to 'board/freescale')
-rw-r--r--board/freescale/mx53loco/mx53loco.c31
1 files changed, 24 insertions, 7 deletions
diff --git a/board/freescale/mx53loco/mx53loco.c b/board/freescale/mx53loco/mx53loco.c
index 08dd66f..b32a97f 100644
--- a/board/freescale/mx53loco/mx53loco.c
+++ b/board/freescale/mx53loco/mx53loco.c
@@ -30,24 +30,41 @@
DECLARE_GLOBAL_DATA_PTR;
-int dram_init(void)
+static uint32_t mx53_dram_size[2];
+
+phys_size_t get_effective_memsize(void)
{
- u32 size1, size2;
+ /*
+ * WARNING: We must override get_effective_memsize() function here
+ * to report only the size of the first DRAM bank. This is to make
+ * U-Boot relocator place U-Boot into valid memory, that is, at the
+ * end of the first DRAM bank. If we did not override this function
+ * like so, U-Boot would be placed at the address of the first DRAM
+ * bank + total DRAM size - sizeof(uboot), which in the setup where
+ * each DRAM bank contains 512MiB of DRAM would result in placing
+ * U-Boot into invalid memory area close to the end of the first
+ * DRAM bank.
+ */
+ return mx53_dram_size[0];
+}
- size1 = get_ram_size((void *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
- size2 = get_ram_size((void *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE);
+int dram_init(void)
+{
+ mx53_dram_size[0] = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
+ mx53_dram_size[1] = get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
- gd->ram_size = size1 + size2;
+ gd->ram_size = mx53_dram_size[0] + mx53_dram_size[1];
return 0;
}
+
void dram_init_banksize(void)
{
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
- gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
+ gd->bd->bi_dram[0].size = mx53_dram_size[0];
gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
- gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
+ gd->bd->bi_dram[1].size = mx53_dram_size[1];
}
u32 get_board_rev(void)