diff options
Diffstat (limited to 'arch/arm/cpu/armv7/virt-dt.c')
| -rw-r--r-- | arch/arm/cpu/armv7/virt-dt.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/virt-dt.c b/arch/arm/cpu/armv7/virt-dt.c index caaaaabccd..32c368f145 100644 --- a/arch/arm/cpu/armv7/virt-dt.c +++ b/arch/arm/cpu/armv7/virt-dt.c @@ -16,6 +16,7 @@ */ #include <common.h> +#include <errno.h> #include <stdio_dev.h> #include <linux/ctype.h> #include <linux/types.h> @@ -88,6 +89,34 @@ static int fdt_psci(void *fdt) return 0; } +int armv7_apply_memory_carveout(u64 *start, u64 *size) +{ +#ifdef CONFIG_ARMV7_SECURE_RESERVE_SIZE + if (*start + *size < CONFIG_ARMV7_SECURE_BASE || + *start >= (u64)CONFIG_ARMV7_SECURE_BASE + + CONFIG_ARMV7_SECURE_RESERVE_SIZE) + return 0; + + /* carveout must be at the beginning or the end of the bank */ + if (*start == CONFIG_ARMV7_SECURE_BASE || + *start + *size == (u64)CONFIG_ARMV7_SECURE_BASE + + CONFIG_ARMV7_SECURE_RESERVE_SIZE) { + if (*size < CONFIG_ARMV7_SECURE_RESERVE_SIZE) { + debug("Secure monitor larger than RAM bank!?\n"); + return -EINVAL; + } + *size -= CONFIG_ARMV7_SECURE_RESERVE_SIZE; + if (*start == CONFIG_ARMV7_SECURE_BASE) + *start += CONFIG_ARMV7_SECURE_RESERVE_SIZE; + return 0; + } + debug("Secure monitor not located at beginning or end of RAM bank\n"); + return -EINVAL; +#else /* !CONFIG_ARMV7_SECURE_RESERVE_SIZE */ + return 0; +#endif +} + int psci_update_dt(void *fdt) { #ifdef CONFIG_ARMV7_NONSEC |