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riscv: Set text_offset correctly for M-Mode 

[ Upstream commit 79605f1394 ]

M-Mode Linux is loaded at the start of RAM, not 2MB later. Perhaps this
should be calculated based on PAGE_OFFSET somehow? Even better would be to
deprecate text_offset and instead introduce something absolute.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Sean Anderson 2020-10-22 16:30:12 -04:00 committed by Greg Kroah-Hartman
parent 6d8b433769
commit 37a048d790
1 changed files with 5 additions and 0 deletions
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5
arch/riscv/kernel/head.S
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@ -26,12 +26,17 @@ ENTRY(_start)
/* reserved */
.word 0
.balign 8
#ifdef CONFIG_RISCV_M_MODE
/* Image load offset (0MB) from start of RAM for M-mode */
.dword 0
#else
#if __riscv_xlen == 64
/* Image load offset(2MB) from start of RAM */
.dword 0x200000
#else
/* Image load offset(4MB) from start of RAM */
.dword 0x400000
#endif
#endif
/* Effective size of kernel image */
.dword _end - _start