You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
4.5 KiB
128 lines
4.5 KiB
/*
|
|
* 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/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;
|
|
}
|
|
|