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sunxi: A23/A33/H3: Move sun8i secure monitor to SRAM A2

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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>
This commit is contained in:
Samuel Holland 2021-04-18 22:21:41 -05:00 committed by Andre Przywara
parent 1011ebc72b
commit 1ebfc0c631
2 changed files with 21 additions and 0 deletions
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11
arch/arm/include/asm/arch-sunxi/cpu_sun4i.h
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@ -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 */

10
include/configs/sun8i.h
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@ -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
*/