i.MX28: Improve passing of data from SPL to U-Boot
Pass memory size from SPL via structure located in SRAM instead of SCRATCH
registers. This allows passing more data about boot from SPL to U-Boot, like the
boot mode pads configuration.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
diff --git a/arch/arm/cpu/arm926ejs/mx28/mx28.c b/arch/arm/cpu/arm926ejs/mx28/mx28.c
index dc0338d..54a68e1 100644
--- a/arch/arm/cpu/arm926ejs/mx28/mx28.c
+++ b/arch/arm/cpu/arm926ejs/mx28/mx28.c
@@ -279,22 +279,16 @@
int mx28_dram_init(void)
{
- struct mx28_digctl_regs *digctl_regs =
- (struct mx28_digctl_regs *)MXS_DIGCTL_BASE;
- uint32_t sz[2];
+ struct mx28_spl_data *data = (struct mx28_spl_data *)
+ ((CONFIG_SYS_TEXT_BASE - sizeof(struct mx28_spl_data)) & ~0xf);
- sz[0] = readl(&digctl_regs->hw_digctl_scratch0);
- sz[1] = readl(&digctl_regs->hw_digctl_scratch1);
-
- if (sz[0] != sz[1]) {
+ if (data->mem_dram_size == 0) {
printf("MX28:\n"
- "Error, the RAM size in HW_DIGCTRL_SCRATCH0 and\n"
- "HW_DIGCTRL_SCRATCH1 is not the same. Please\n"
- "verify these two registers contain valid RAM size!\n");
+ "Error, the RAM size passed up from SPL is 0!\n");
hang();
}
- gd->ram_size = sz[0];
+ gd->ram_size = data->mem_dram_size;
return 0;
}