[linux-2.6-block.git] / arch / powerpc / boot / of.c

/*
 * Copyright (C) Paul Mackerras 1997.
 *
 * 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.
 */
#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;

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 ((void *)addr != (void *)-1)
			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;
	}
}

void 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;
	}
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) Paul Mackerras 1997.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*/
	9	#include <stdarg.h>
decd300b	10	#include <stddef.h>
b2c5f619 MG	11	#include "types.h"
b2c5f619 MG	12	#include "elf.h"
decd300b OH	13	#include "string.h"
decd300b OH	14	#include "stdio.h"
b2c5f619 MG	15	#include "page.h"
b2c5f619 MG	16	#include "ops.h"
7840e5e9	17
2e601613	18	#include "of.h"
1da177e4	19
b2c5f619 MG	20	/* Value picked to match that used by yaboot */
	21	#define PROG_START 0x01400000 /* only used on 64-bit systems */
	22	#define RAM_END (512<<20) /* Fixme: use OF */
	23	#define ONE_MB 0x100000
	24
b2c5f619 MG	25
	26
	27	static unsigned long claim_base;
	28
4ca478e6	29	static void *of_try_claim(unsigned long size)
b2c5f619 MG	30	{
b2c5f619 MG	31	unsigned long addr = 0;
b2c5f619	32
c998de14	33	if (claim_base == 0)
b2c5f619	34	claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
b2c5f619 MG	35
	36	for(; claim_base < RAM_END; claim_base += ONE_MB) {
	37	#ifdef DEBUG
	38	printf(" trying: 0x%08lx\n\r", claim_base);
	39	#endif
2e601613	40	addr = (unsigned long)of_claim(claim_base, size, 0);
b2c5f619 MG	41	if ((void )addr != (void )-1)
	42	break;
	43	}
	44	if (addr == 0)
	45	return NULL;
	46	claim_base = PAGE_ALIGN(claim_base + size);
	47	return (void *)addr;
	48	}
	49
	50	static void of_image_hdr(const void *hdr)
	51	{
	52	const Elf64_Ehdr *elf64 = hdr;
	53
	54	if (elf64->e_ident[EI_CLASS] == ELFCLASS64) {
	55	/*
	56	* Maintain a "magic" minimum address. This keeps some older
	57	* firmware platforms running.
	58	*/
	59	if (claim_base < PROG_START)
	60	claim_base = PROG_START;
	61	}
	62	}
	63
cd197ffc	64	void platform_init(unsigned long a1, unsigned long a2, void *promptr)
b2c5f619	65	{
b2c5f619 MG	66	platform_ops.image_hdr = of_image_hdr;
b2c5f619 MG	67	platform_ops.malloc = of_try_claim;
b2c5f619	68	platform_ops.exit = of_exit;
79c85419	69	platform_ops.vmlinux_alloc = of_vmlinux_alloc;
b2c5f619 MG	70
	71	dt_ops.finddevice = of_finddevice;
	72	dt_ops.getprop = of_getprop;
	73	dt_ops.setprop = of_setprop;
b2c5f619	74
2e601613	75	of_console_init();
b2c5f619	76
2e601613	77	of_init(promptr);
cd197ffc	78	loader_info.promptr = promptr;
390cbb56 PM	79	if (a1 && a2 && a2 != 0xdeadbeef) {
	80	loader_info.initrd_addr = a1;
	81	loader_info.initrd_size = a2;
	82	}
b2c5f619	83	}