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author | Patrick Delaunay <patrick.delaunay@st.com> | 2020-03-18 11:22:48 +0300 |
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committer | Patrick Delaunay <patrick.delaunay@st.com> | 2020-05-14 10:02:12 +0300 |
commit | 4a1b975dac0270f553f5a58b0e7d809c8c8ef61f (patch) | |
tree | ce32e71d8d6d6cda9ce4c3c35545bfb55e1e1285 /arch/arm/mach-stm32mp/dram_init.c | |
parent | 28a28ba9764d02b1e52938b5f7d322ffd13b01f1 (diff) | |
download | u-boot-4a1b975dac0270f553f5a58b0e7d809c8c8ef61f.tar.xz |
board: stm32mp1: reserve memory for OP-TEE in device tree
Add reserve memory for OP-TEE in U-Boot and in kernel device tree:
- no more reduce the DDR size in "memory" node:
CONFIG_SYS_MEM_TOP_HIDE is no more used
- U-Boot device-tree defines the needed "reserved-memory" for OP-TEE
and U-Boot should not use this reserved memory: board_get_usable_ram_top
use lmb lib to found the first free region, the not reserved
memory, enough to relocate U-Boot: the needed size of U-Boot
is estimated with gd->mon_len + CONFIG_SYS_MALLOC_LEN.
- the optee node ("optee@...": firmware with compatible "linaro,optee-tz")
and the associated "reserved-memory" are deactivated in kernel device
tree when OP-TEE is not detected by U-Boot to prevent kernel issue
(memory is reserved but not used, optee driver probe failed).
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Diffstat (limited to 'arch/arm/mach-stm32mp/dram_init.c')
-rw-r--r-- | arch/arm/mach-stm32mp/dram_init.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-stm32mp/dram_init.c b/arch/arm/mach-stm32mp/dram_init.c index 7688b3e315..3233415eff 100644 --- a/arch/arm/mach-stm32mp/dram_init.c +++ b/arch/arm/mach-stm32mp/dram_init.c @@ -5,6 +5,7 @@ #include <common.h> #include <dm.h> +#include <lmb.h> #include <ram.h> DECLARE_GLOBAL_DATA_PTR; @@ -31,3 +32,20 @@ int dram_init(void) return 0; } + +ulong board_get_usable_ram_top(ulong total_size) +{ + phys_addr_t reg; + struct lmb lmb; + + /* found enough not-reserved memory to relocated U-Boot */ + lmb_init(&lmb); + lmb_add(&lmb, gd->ram_base, gd->ram_size); + boot_fdt_add_mem_rsv_regions(&lmb, (void *)gd->fdt_blob); + reg = lmb_alloc(&lmb, CONFIG_SYS_MALLOC_LEN + total_size, SZ_4K); + + if (reg) + return ALIGN(reg + CONFIG_SYS_MALLOC_LEN + total_size, SZ_4K); + + return gd->ram_top; +} |