From 342abc1472248b38698a52a6e4c66e30c9bfaad7 Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Thu, 8 Dec 2022 20:33:57 +0000 Subject: [PATCH] sunxi: boot0.h: allow RVBAR MMIO address customisation To switch the ARMv8 Allwinner SoCs into the 64-bit AArch64 ISA, we need to program the 64-bit start code address into an MMIO mapped register that shadows the architectural RVBAR register. This address is SoC specific, with just two versions out there so far. Now a third address emerged, on a *variant* of an existing SoC (H616). Change the boot0.h start code to make this address a Kconfig selectable option, to allow easier maintenance. Signed-off-by: Andre Przywara Reviewed-by: Jernej Skrabec --- arch/arm/include/asm/arch-sunxi/boot0.h | 7 ++----- arch/arm/mach-sunxi/Kconfig | 12 ++++++++++++ 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/arch/arm/include/asm/arch-sunxi/boot0.h b/arch/arm/include/asm/arch-sunxi/boot0.h index 46b7e073b5..59ea75a96b 100644 --- a/arch/arm/include/asm/arch-sunxi/boot0.h +++ b/arch/arm/include/asm/arch-sunxi/boot0.h @@ -39,11 +39,8 @@ .word 0xf57ff06f // isb sy .word 0xe320f003 // wfi .word 0xeafffffd // b @wfi -#ifndef CONFIG_SUN50I_GEN_H6 - .word 0x017000a0 // writeable RVBAR mapping address -#else - .word 0x09010040 // writeable RVBAR mapping address -#endif + + .word CONFIG_SUNXI_RVBAR_ADDRESS // writable RVBAR mapping addr #ifdef CONFIG_SPL_BUILD .word CONFIG_SPL_TEXT_BASE #else diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 6be8a4de53..71a413108f 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -129,6 +129,18 @@ config SUNXI_SRAM_ADDRESS Some newer SoCs map the boot ROM at address 0 instead and move the SRAM to a different address. +config SUNXI_RVBAR_ADDRESS + hex + depends on ARM64 + default 0x09010040 if SUN50I_GEN_H6 + default 0x017000a0 + ---help--- + The read-only RVBAR system register holds the address of the first + instruction to execute after a reset. Allwinner cores provide a + writable MMIO backing store for this register, to allow to set the + entry point when switching to AArch64. This store is on different + addresses, depending on the SoC. + config SUNXI_A64_TIMER_ERRATUM bool -- 2.39.5