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Diffstat (limited to 'arch/arm/mach-tegra/board.c')
-rw-r--r--arch/arm/mach-tegra/board.c56
1 files changed, 48 insertions, 8 deletions
diff --git a/arch/arm/mach-tegra/board.c b/arch/arm/mach-tegra/board.c
index b6a84a5..0ebaf19 100644
--- a/arch/arm/mach-tegra/board.c
+++ b/arch/arm/mach-tegra/board.c
@@ -11,6 +11,7 @@
#include <asm/arch/funcmux.h>
#include <asm/arch/mc.h>
#include <asm/arch/tegra.h>
+#include <asm/arch-tegra/ap.h>
#include <asm/arch-tegra/board.h>
#include <asm/arch-tegra/pmc.h>
#include <asm/arch-tegra/sys_proto.h>
@@ -28,27 +29,66 @@ enum {
UART_COUNT = 5,
};
+#if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
+#if !defined(CONFIG_TEGRA124)
+#error tegra_cpu_is_non_secure has only been validated on Tegra124
+#endif
+bool tegra_cpu_is_non_secure(void)
+{
+ /*
+ * This register reads 0xffffffff in non-secure mode. This register
+ * only implements bits 31:20, so the lower bits will always read 0 in
+ * secure mode. Thus, the lower bits are an indicator for secure vs.
+ * non-secure mode.
+ */
+ struct mc_ctlr *mc = (struct mc_ctlr *)NV_PA_MC_BASE;
+ uint32_t mc_s_cfg0 = readl(&mc->mc_security_cfg0);
+ return (mc_s_cfg0 & 1) == 1;
+}
+#endif
+
/* Read the RAM size directly from the memory controller */
unsigned int query_sdram_size(void)
{
struct mc_ctlr *const mc = (struct mc_ctlr *)NV_PA_MC_BASE;
- u32 size_mb;
+ u32 emem_cfg, size_bytes;
- size_mb = readl(&mc->mc_emem_cfg);
+ emem_cfg = readl(&mc->mc_emem_cfg);
#if defined(CONFIG_TEGRA20)
- debug("mc->mc_emem_cfg (MEM_SIZE_KB) = 0x%08x\n", size_mb);
- size_mb = get_ram_size((void *)PHYS_SDRAM_1, size_mb * 1024);
+ debug("mc->mc_emem_cfg (MEM_SIZE_KB) = 0x%08x\n", emem_cfg);
+ size_bytes = get_ram_size((void *)PHYS_SDRAM_1, emem_cfg * 1024);
#else
- debug("mc->mc_emem_cfg (MEM_SIZE_MB) = 0x%08x\n", size_mb);
- size_mb = get_ram_size((void *)PHYS_SDRAM_1, size_mb * 1024 * 1024);
+ debug("mc->mc_emem_cfg (MEM_SIZE_MB) = 0x%08x\n", emem_cfg);
+ /*
+ * If >=4GB RAM is present, the byte RAM size won't fit into 32-bits
+ * and will wrap. Clip the reported size to the maximum that a 32-bit
+ * variable can represent (rounded to a page).
+ */
+ if (emem_cfg >= 4096) {
+ size_bytes = U32_MAX & ~(0x1000 - 1);
+ } else {
+ /* RAM size EMC is programmed to. */
+ size_bytes = emem_cfg * 1024 * 1024;
+ /*
+ * If all RAM fits within 32-bits, it can be accessed without
+ * LPAE, so go test the RAM size. Otherwise, we can't access
+ * all the RAM, and get_ram_size() would get confused, so
+ * avoid using it. There's no reason we should need this
+ * validation step anyway.
+ */
+ if (emem_cfg <= (0 - PHYS_SDRAM_1) / (1024 * 1024))
+ size_bytes = get_ram_size((void *)PHYS_SDRAM_1,
+ size_bytes);
+ }
#endif
#if defined(CONFIG_TEGRA30) || defined(CONFIG_TEGRA114)
/* External memory limited to 2047 MB due to IROM/HI-VEC */
- if (size_mb == SZ_2G) size_mb -= SZ_1M;
+ if (size_bytes == SZ_2G)
+ size_bytes -= SZ_1M;
#endif
- return size_mb;
+ return size_bytes;
}
int dram_init(void)