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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2012 Antony Pavlov <antonynpavlov@gmail.com>
*/
#include <init.h>
#include <common.h>
#include <string.h>
#include <memory.h>
#include <asm-generic/memory_layout.h>
#include <asm/sections.h>
#include <asm/cpu-features.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <linux/sizes.h>
extern void exception_vec(void);
extern void exception_vec_end(void);
void main_entry(void *fdt, u32 fdt_size);
static void trap_init(void)
{
const unsigned long vec_size = exception_vec_end - exception_vec;
const unsigned long ebase = CKSEG1;
/* copy the generic exception handlers to their final destination */
memcpy((void *)(ebase + 0x180), &exception_vec, vec_size);
/* FIXME: handle tlb */
memcpy((void *)(ebase), &exception_vec, vec_size);
memcpy((void *)(ebase + 0x80), &exception_vec, vec_size);
/* unset BOOT EXCEPTION VECTOR bit */
write_c0_status(read_c0_status() & ~ST0_BEV);
}
extern void *glob_fdt;
extern u32 glob_fdt_size;
extern unsigned long mips_stack_top;
/**
* Called plainly from assembler code
*
* @note The C environment isn't initialized yet
*/
void __bare_init main_entry(void *fdt, u32 fdt_size)
{
unsigned long malloc_start, malloc_end;
/* clear the BSS first */
memset(__bss_start, 0x00, __bss_stop - __bss_start);
cpu_probe();
trap_init();
malloc_end = (unsigned long)_stext;
if (MALLOC_SIZE > 0)
malloc_start = malloc_end - MALLOC_SIZE;
else
malloc_start = malloc_end - SZ_8M;
pr_debug("initializing malloc pool at 0x%08lx (size 0x%08lx)\n",
malloc_start, malloc_end - malloc_start);
mem_malloc_init((void *)malloc_start, (void *)malloc_end - 1);
mips_stack_top = malloc_start;
glob_fdt = fdt;
glob_fdt_size = fdt_size;
start_barebox();
}
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