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riscv: remove .text section size limitation for XIP

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Currently there's a limit of 8MB for the .text section of a RISC-V
image in the XIP case. This breaks compilation of many automatic
builds and is generally inconvenient. This patch removes that
limitation and optimizes XIP image file size at the same time.

Signed-off-by: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Vitaly Wool
2021-10-11 11:14:14 +02:00
committed by Palmer Dabbelt
parent 241527bb84
commit f9ace4ede4
4 changed files with 26 additions and 9 deletions
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7
arch/riscv/mm/init.c
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@@ -41,7 +41,7 @@ phys_addr_t phys_ram_base __ro_after_init;
EXPORT_SYMBOL(phys_ram_base);
#ifdef CONFIG_XIP_KERNEL
extern char _xiprom[], _exiprom[];
extern char _xiprom[], _exiprom[], __data_loc;
#endif
unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
@@ -454,10 +454,9 @@ static uintptr_t __init best_map_size(phys_addr_t base, phys_addr_t size)
/* called from head.S with MMU off */
asmlinkage void __init __copy_data(void)
{
void *from = (void *)(&_sdata);
void *end = (void *)(&_end);
void *from = (void *)(&__data_loc);
void *to = (void *)CONFIG_PHYS_RAM_BASE;
size_t sz = (size_t)(end - from + 1);
size_t sz = (size_t)((uintptr_t)(&_end) - (uintptr_t)(&_sdata));
memcpy(to, from, sz);
}