linux/arch/powerpc/boot/of.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

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);
}