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authorSamuel Holland <samuel@sholland.org>2021-04-18 22:21:41 -0500
committerAndre Przywara <andre.przywara@arm.com>2021-08-01 00:11:34 +0100
commit1ebfc0c631e3073d6f7ae97aa001b26b660c08c4 (patch)
treed3052755235d40eb4ca41dbdf40e0eea431ce430
parent1011ebc72bda061cc9d34c1d6ff4506291a88657 (diff)
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sunxi: A23/A33/H3: Move sun8i secure monitor to SRAM A2
So far for the H3, A23, and A33 SoCs, we use DRAM to hold the secure monitor code (providing PSCI runtime services). And while those SoCs do not have the secure SRAM B like older SoCs, there is enough (secure) SRAM A2 to put the monitor code and data in there instead. Follow the design of 64-bit SoCs and use the first part for the monitor, and the last 16 KiB for the SCP firmware. With this change, the monitor no longer needs to reserve a region in DRAM. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Andre Przywara <andre.przywara@arm.com> [Andre: amend commit message, fix R40 and V3s build] Signed-off-by: Andre Przywara <andre.przywara@arm.com>
-rw-r--r--arch/arm/include/asm/arch-sunxi/cpu_sun4i.h11
-rw-r--r--include/configs/sun8i.h10
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h b/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h
index 02ce739..d4c795d 100644
--- a/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h
+++ b/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h
@@ -11,7 +11,18 @@
#define SUNXI_SRAM_A1_BASE 0x00000000
#define SUNXI_SRAM_A1_SIZE (16 * 1024) /* 16 kiB */
+#if defined(CONFIG_SUNXI_GEN_SUN6I) && \
+ !defined(CONFIG_MACH_SUN8I_R40) && \
+ !defined(CONFIG_MACH_SUN8I_V3S)
+#define SUNXI_SRAM_A2_BASE 0x00040000
+#ifdef CONFIG_MACH_SUN8I_H3
+#define SUNXI_SRAM_A2_SIZE (48 * 1024) /* 16+32 kiB */
+#else
+#define SUNXI_SRAM_A2_SIZE (80 * 1024) /* 16+64 kiB */
+#endif
+#else
#define SUNXI_SRAM_A2_BASE 0x00004000 /* 16 kiB */
+#endif
#define SUNXI_SRAM_A3_BASE 0x00008000 /* 13 kiB */
#define SUNXI_SRAM_A4_BASE 0x0000b400 /* 3 kiB */
#define SUNXI_SRAM_D_BASE 0x00010000 /* 4 kiB */
diff --git a/include/configs/sun8i.h b/include/configs/sun8i.h
index 9b4675e..27c9808 100644
--- a/include/configs/sun8i.h
+++ b/include/configs/sun8i.h
@@ -12,6 +12,16 @@
* A23 specific configuration
*/
+#ifdef SUNXI_SRAM_A2_SIZE
+/*
+ * If the SoC has enough SRAM A2, use that for the secure monitor.
+ * Skip the first 16 KiB of SRAM A2, which is not usable, as only certain bytes
+ * are writable. Reserve the last 17 KiB for the resume shim and SCP firmware.
+ */
+#define CONFIG_ARMV7_SECURE_BASE (SUNXI_SRAM_A2_BASE + 16 * 1024)
+#define CONFIG_ARMV7_SECURE_MAX_SIZE (SUNXI_SRAM_A2_SIZE - 33 * 1024)
+#endif
+
/*
* Include common sunxi configuration where most the settings are
*/