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