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arm: mach-k3: common: Reserve video memory from end of the RAM

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Setup video memory before page table reservation using
"spl_reserve_video_from_ram_top" which ensures framebuffer memory gets
reserved from the end of RAM.

This is done to enable the next stage to directly skip the
pre-reserved area from previous stage right from the end of RAM without
having to make any gaps/holes to accommodate those regions which was the
case before as previous stage reserved region not from the end of RAM.

Use gd->ram_top instead of local ram_top and update gd->reloc_addr after
each reservation to ensure further regions are reserved properly.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
Reviewed-by: Nikhil M Jain <n-jain1@ti.com>
This commit is contained in:
Devarsh Thakkar
2023-12-05 21:25:17 +05:30
committed by Tom Rini
parent 1d3c266758
commit ba20b2443c
1 changed files with 12 additions and 5 deletions
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17
arch/arm/mach-k3/common.c
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@@ -524,19 +524,26 @@ void remove_fwl_configs(struct fwl_data *fwl_data, size_t fwl_data_size)
void spl_enable_cache(void)
{
#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
phys_addr_t ram_top = CFG_SYS_SDRAM_BASE;
gd->ram_top = CFG_SYS_SDRAM_BASE;
int ret = 0;
dram_init();
/* reserve TLB table */
gd->arch.tlb_size = PGTABLE_SIZE;
ram_top += get_effective_memsize();
gd->ram_top += get_effective_memsize();
/* keep ram_top in the 32-bit address space */
if (ram_top >= 0x100000000)
ram_top = (phys_addr_t) 0x100000000;
if (gd->ram_top >= 0x100000000)
gd->ram_top = (phys_addr_t)0x100000000;
gd->arch.tlb_addr = ram_top - gd->arch.tlb_size;
gd->relocaddr = gd->ram_top;
ret = spl_reserve_video_from_ram_top();
if (ret)
panic("Failed to reserve framebuffer memory (%d)\n", ret);
gd->arch.tlb_addr = gd->relocaddr - gd->arch.tlb_size;
gd->arch.tlb_addr &= ~(0x10000 - 1);
debug("TLB table from %08lx to %08lx\n", gd->arch.tlb_addr,
gd->arch.tlb_addr + gd->arch.tlb_size);