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ARM: omap5: add fdt secure dram reservation fixup

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Adds a secure dram reservation fixup for secure
devices, when a region in the emif has been set aside
for secure world use. The size is defined by the
CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE config option.

Signed-off-by: Daniel Allred <d-allred@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Daniel Allred 2016-09-02 00:40:24 -05:00 committed by Tom Rini
parent 32d333f2f0
commit 6696139409
1 changed files with 62 additions and 2 deletions
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64
arch/arm/cpu/armv7/omap5/fdt.c
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@ -153,13 +153,73 @@ static int ft_hs_fixup_sram(void *fdt, bd_t *bd)
static int ft_hs_fixup_sram(void *fdt, bd_t *bd) { return 0; }
#endif
#if (CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE != 0)
static int ft_hs_fixup_dram(void *fdt, bd_t *bd)
{
const char *path, *subpath;
int offs;
u32 sec_mem_start = CONFIG_TI_SECURE_EMIF_REGION_START;
u32 sec_mem_size = CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE;
fdt64_t temp[2];
/* If start address is zero, place at end of DRAM */
if (0 == sec_mem_start)
sec_mem_start =
(CONFIG_SYS_SDRAM_BASE +
(omap_sdram_size() - sec_mem_size));
/* Delete any original secure_reserved node */
path = "/reserved-memory/secure_reserved";
offs = fdt_path_offset(fdt, path);
if (offs >= 0)
fdt_del_node(fdt, offs);
/* Add new secure_reserved node */
path = "/reserved-memory";
offs = fdt_path_offset(fdt, path);
if (offs < 0) {
debug("Node %s not found\n", path);
path = "/";
subpath = "reserved-memory";
fdt_path_offset(fdt, path);
offs = fdt_add_subnode(fdt, offs, subpath);
if (offs < 0) {
printf("Could not create %s%s node.\n", path, subpath);
return 1;
}
path = "/reserved-memory";
offs = fdt_path_offset(fdt, path);
}
subpath = "secure_reserved";
offs = fdt_add_subnode(fdt, offs, subpath);
if (offs < 0) {
printf("Could not create %s%s node.\n", path, subpath);
return 1;
}
temp[0] = cpu_to_fdt64(((u64)sec_mem_start));
temp[1] = cpu_to_fdt64(((u64)sec_mem_size));
fdt_setprop_string(fdt, offs, "compatible",
"ti,dra7-secure-memory");
fdt_setprop_string(fdt, offs, "status", "okay");
fdt_setprop(fdt, offs, "no-map", NULL, 0);
fdt_setprop(fdt, offs, "reg", temp, sizeof(temp));
return 0;
}
#else
static int ft_hs_fixup_dram(void *fdt, bd_t *bd) { return 0; }
#endif
static void ft_hs_fixups(void *fdt, bd_t *bd)
{
/* Check we are running on an HS/EMU device type */
if (GP_DEVICE != get_device_type()) {
if ((ft_hs_fixup_crossbar(fdt, bd) == 0) &&
(ft_hs_disable_rng(fdt, bd) == 0) &&
(ft_hs_fixup_sram(fdt, bd) == 0))
(ft_hs_fixup_sram(fdt, bd) == 0) &&
(ft_hs_fixup_dram(fdt, bd) == 0))
return;
} else {
printf("ERROR: Incorrect device type (GP) detected!");
@ -171,7 +231,7 @@ static void ft_hs_fixups(void *fdt, bd_t *bd)
static void ft_hs_fixups(void *fdt, bd_t *bd)
{
}
#endif
#endif /* #ifdef CONFIG_TI_SECURE_DEVICE */
/*
* Place for general cpu/SoC FDT fixups. Board specific