94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (C) Paul Mackerras 1997.
|
|
*/
|
|
#include <stdarg.h>
|
|
#include <stddef.h>
|
|
#include "types.h"
|
|
#include "elf.h"
|
|
#include "string.h"
|
|
#include "stdio.h"
|
|
#include "page.h"
|
|
#include "ops.h"
|
|
|
|
#include "of.h"
|
|
|
|
/* Value picked to match that used by yaboot */
|
|
#define PROG_START 0x01400000 /* only used on 64-bit systems */
|
|
#define RAM_END (512<<20) /* Fixme: use OF */
|
|
#define ONE_MB 0x100000
|
|
|
|
|
|
|
|
static unsigned long claim_base;
|
|
|
|
void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
|
|
unsigned long r6, unsigned long r7);
|
|
|
|
static void *of_try_claim(unsigned long size)
|
|
{
|
|
unsigned long addr = 0;
|
|
|
|
if (claim_base == 0)
|
|
claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
|
|
|
|
for(; claim_base < RAM_END; claim_base += ONE_MB) {
|
|
#ifdef DEBUG
|
|
printf(" trying: 0x%08lx\n\r", claim_base);
|
|
#endif
|
|
addr = (unsigned long) of_claim(claim_base, size, 0);
|
|
if (addr != PROM_ERROR)
|
|
break;
|
|
}
|
|
if (addr == 0)
|
|
return NULL;
|
|
claim_base = PAGE_ALIGN(claim_base + size);
|
|
return (void *)addr;
|
|
}
|
|
|
|
static void of_image_hdr(const void *hdr)
|
|
{
|
|
const Elf64_Ehdr *elf64 = hdr;
|
|
|
|
if (elf64->e_ident[EI_CLASS] == ELFCLASS64) {
|
|
/*
|
|
* Maintain a "magic" minimum address. This keeps some older
|
|
* firmware platforms running.
|
|
*/
|
|
if (claim_base < PROG_START)
|
|
claim_base = PROG_START;
|
|
}
|
|
}
|
|
|
|
static void of_platform_init(unsigned long a1, unsigned long a2, void *promptr)
|
|
{
|
|
platform_ops.image_hdr = of_image_hdr;
|
|
platform_ops.malloc = of_try_claim;
|
|
platform_ops.exit = of_exit;
|
|
platform_ops.vmlinux_alloc = of_vmlinux_alloc;
|
|
|
|
dt_ops.finddevice = of_finddevice;
|
|
dt_ops.getprop = of_getprop;
|
|
dt_ops.setprop = of_setprop;
|
|
|
|
of_console_init();
|
|
|
|
of_init(promptr);
|
|
loader_info.promptr = promptr;
|
|
if (a1 && a2 && a2 != 0xdeadbeef) {
|
|
loader_info.initrd_addr = a1;
|
|
loader_info.initrd_size = a2;
|
|
}
|
|
}
|
|
|
|
void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
|
|
unsigned long r6, unsigned long r7)
|
|
{
|
|
/* Detect OF vs. ePAPR boot */
|
|
if (r5)
|
|
of_platform_init(r3, r4, (void *)r5);
|
|
else
|
|
epapr_platform_init(r3, r4, r5, r6, r7);
|
|
}
|
|
|