Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * 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;

        }

}