mirror of
https://github.com/AsahiLinux/u-boot
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5bb2c550b1
Moving of internal registers from INTREG_BASE_ADDR_REG to SOC_REGS_PHY_BASE needs to be done very early, prior calling any function which may touch internal registers, like debug_uart_init(). So do it earlier in arch_very_early_init() instead of arch_cpu_init(). Movement is done in proper U-Boot, not in SPL. SPL may return to bootrom and bootrom requires internal registers at (old) expected location. Signed-off-by: Pali Rohár <pali@kernel.org> Reviewed-by: Stefan Roese <sr@denx.de>
27 lines
666 B
ArmAsm
27 lines
666 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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#include <config.h>
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#include <linux/linkage.h>
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ENTRY(arch_very_early_init)
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#ifdef CONFIG_ARMADA_38X
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/*
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* Only with disabled MMU its possible to switch the base
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* register address on Armada 38x. Without this the SDRAM
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* located at >= 0x4000.0000 is also not accessible, as its
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* still locked to cache.
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*/
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mrc p15, 0, r0, c1, c0, 0
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bic r0, #1
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mcr p15, 0, r0, c1, c0, 0
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#endif
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/* Move internal registers from INTREG_BASE_ADDR_REG to SOC_REGS_PHY_BASE */
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ldr r0, =SOC_REGS_PHY_BASE
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ldr r1, =INTREG_BASE_ADDR_REG
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str r0, [r1]
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add r0, r0, #0xC000
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mcr p15, 4, r0, c15, c0
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bx lr
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ENDPROC(arch_very_early_init)
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