https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 11a48a5a18c63fd7621bb050228cebf13566e4d8 authored by Linus Torvalds on 16 February 2020, 21:16:59 UTC
Linux 5.6-rc2
Linux 5.6-rc2
Tip revision: 11a48a5
of.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);
}