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/*
* arch/ppc/boot/simple/openbios.c
*
* Copyright (c) 2005 DENX Software Engineering
* Stefan Roese <sr@denx.de>
*
* Based on original work by
* 2005 (c) SYSGO AG - g.jaeger@sysgo.com
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without
* any warranty of any kind, whether express or implied.
*
*/
#include <linux/types.h>
#include <linux/config.h>
#include <linux/string.h>
#include <asm/ppcboot.h>
#include <asm/ibm4xx.h>
#include <asm/reg.h>
#ifdef CONFIG_40x
#include <asm/io.h>
#endif
#if defined(CONFIG_BUBINGA)
#define BOARD_INFO_VECTOR 0xFFF80B50 /* openbios 1.19 moved this vector down - armin */
#else
#define BOARD_INFO_VECTOR 0xFFFE0B50
#endif
#ifdef CONFIG_40x
/* Supply a default Ethernet address for those eval boards that don't
* ship with one. This is an address from the MBX board I have, so
* it is unlikely you will find it on your network.
*/
static ushort def_enet_addr[] = { 0x0800, 0x3e26, 0x1559 };
extern unsigned long timebase_period_ns;
#endif /* CONFIG_40x */
extern unsigned long decompress_kernel(unsigned long load_addr, int num_words,
unsigned long cksum);
/* We need to make sure that this is before the images to ensure
* that it's in a mapped location. */
bd_t hold_resid_buf __attribute__ ((__section__ (".data.boot")));
bd_t *hold_residual = &hold_resid_buf;
typedef struct openbios_board_info {
unsigned char bi_s_version[4]; /* Version of this structure */
unsigned char bi_r_version[30]; /* Version of the IBM ROM */
unsigned int bi_memsize; /* DRAM installed, in bytes */
#ifdef CONFIG_405EP
unsigned char bi_enetaddr[2][6]; /* Local Ethernet MAC address */
#else /* CONFIG_405EP */
unsigned char bi_enetaddr[6]; /* Local Ethernet MAC address */
#endif /* CONFIG_405EP */
unsigned char bi_pci_enetaddr[6]; /* PCI Ethernet MAC address */
unsigned int bi_intfreq; /* Processor speed, in Hz */
unsigned int bi_busfreq; /* PLB Bus speed, in Hz */
unsigned int bi_pci_busfreq; /* PCI Bus speed, in Hz */
#ifdef CONFIG_405EP
unsigned int bi_opb_busfreq; /* OPB Bus speed, in Hz */
unsigned int bi_pllouta_freq; /* PLL OUTA speed, in Hz */
#endif /* CONFIG_405EP */
} openbios_bd_t;
void *
load_kernel(unsigned long load_addr, int num_words, unsigned long cksum,
void *ign1, void *ign2)
{
#ifdef CONFIG_40x
openbios_bd_t *openbios_bd = NULL;
openbios_bd_t *(*get_board_info)(void) =
(openbios_bd_t *(*)(void))(*(unsigned long *)BOARD_INFO_VECTOR);
/*
* On 40x platforms we not only need the MAC-addresses, but also the
* clocks and memsize. Now try to get all values using the OpenBIOS
* "get_board_info()" callback.
*/
if ((openbios_bd = get_board_info()) != NULL) {
/*
* Copy bd_info from OpenBIOS struct into U-Boot struct
* used by kernel
*/
hold_residual->bi_memsize = openbios_bd->bi_memsize;
hold_residual->bi_intfreq = openbios_bd->bi_intfreq;
hold_residual->bi_busfreq = openbios_bd->bi_busfreq;
hold_residual->bi_pci_busfreq = openbios_bd->bi_pci_busfreq;
memcpy(hold_residual->bi_pci_enetaddr, openbios_bd->bi_pci_enetaddr, 6);
#ifdef CONFIG_405EP
memcpy(hold_residual->bi_enetaddr, openbios_bd->bi_enetaddr[0], 6);
memcpy(hold_residual->bi_enet1addr, openbios_bd->bi_enetaddr[1], 6);
hold_residual->bi_opbfreq = openbios_bd->bi_opb_busfreq;
hold_residual->bi_procfreq = openbios_bd->bi_pllouta_freq;
#else /* CONFIG_405EP */
memcpy(hold_residual->bi_enetaddr, openbios_bd->bi_enetaddr, 6);
#endif /* CONFIG_405EP */
} else {
/* Hmmm...better try to stuff some defaults.
*/
hold_residual->bi_memsize = 16 * 1024 * 1024;
hold_residual->bi_intfreq = 200000000;
hold_residual->bi_busfreq = 100000000;
hold_residual->bi_pci_busfreq = 66666666;
/*
* Only supply one mac-address in this fallback
*/
memcpy(hold_residual->bi_enetaddr, (void *)def_enet_addr, 6);
#ifdef CONFIG_405EP
hold_residual->bi_opbfreq = 50000000;
hold_residual->bi_procfreq = 200000000;
#endif /* CONFIG_405EP */
}
timebase_period_ns = 1000000000 / hold_residual->bi_intfreq;
#endif /* CONFIG_40x */
#ifdef CONFIG_440GP
/* simply copy the MAC addresses */
memcpy(hold_residual->bi_enetaddr, (char *)OPENBIOS_MAC_BASE, 6);
memcpy(hold_residual->bi_enet1addr, (char *)(OPENBIOS_MAC_BASE+OPENBIOS_MAC_OFFSET), 6);
#endif /* CONFIG_440GP */
decompress_kernel(load_addr, num_words, cksum);
return (void *)hold_residual;
}
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