projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 3e9e7c1d MP |
2 | * Copyright (c) 2005 DENX Software Engineering |
| 3 | * Stefan Roese <sr@denx.de> | |
| 4 | * | |
| 5 | * Based on original work by | |
| 6 | * 2005 (c) SYSGO AG - g.jaeger@sysgo.com | |
| 7 | * | |
| 1da177e4 LT |
8 | * This file is licensed under the terms of the GNU General Public |
| 9 | * License version 2. This program is licensed "as is" without | |
| 10 | * any warranty of any kind, whether express or implied. | |
| 11 | * | |
| 1da177e4 LT |
12 | */ |
| 13 | ||
| 14 | #include <linux/types.h> | |
| 15 | #include <linux/config.h> | |
| 16 | #include <linux/string.h> | |
| 17 | #include <asm/ppcboot.h> | |
| 3e9e7c1d MP |
18 | #include <asm/ibm4xx.h> |
| 19 | #include <asm/reg.h> | |
| 20 | #ifdef CONFIG_40x | |
| 21 | #include <asm/io.h> | |
| 22 | #endif | |
| 23 | ||
| 24 | #if defined(CONFIG_BUBINGA) | |
| 25 | #define BOARD_INFO_VECTOR 0xFFF80B50 /* openbios 1.19 moved this vector down - armin */ | |
| 26 | #else | |
| 27 | #define BOARD_INFO_VECTOR 0xFFFE0B50 | |
| 28 | #endif | |
| 29 | ||
| 30 | #ifdef CONFIG_40x | |
| 31 | /* Supply a default Ethernet address for those eval boards that don't | |
| 32 | * ship with one. This is an address from the MBX board I have, so | |
| 33 | * it is unlikely you will find it on your network. | |
| 34 | */ | |
| 35 | static ushort def_enet_addr[] = { 0x0800, 0x3e26, 0x1559 }; | |
| 36 | ||
| 37 | extern unsigned long timebase_period_ns; | |
| 38 | #endif /* CONFIG_40x */ | |
| 1da177e4 LT |
39 | |
| 40 | extern unsigned long decompress_kernel(unsigned long load_addr, int num_words, | |
| 41 | unsigned long cksum); | |
| 42 | ||
| 43 | /* We need to make sure that this is before the images to ensure | |
| 44 | * that it's in a mapped location. */ | |
| 45 | bd_t hold_resid_buf __attribute__ ((__section__ (".data.boot"))); | |
| 46 | bd_t *hold_residual = &hold_resid_buf; | |
| 47 | ||
| 3e9e7c1d MP |
48 | typedef struct openbios_board_info { |
| 49 | unsigned char bi_s_version[4]; /* Version of this structure */ | |
| 50 | unsigned char bi_r_version[30]; /* Version of the IBM ROM */ | |
| 51 | unsigned int bi_memsize; /* DRAM installed, in bytes */ | |
| 52 | #ifdef CONFIG_405EP | |
| 53 | unsigned char bi_enetaddr[2][6]; /* Local Ethernet MAC address */ | |
| 54 | #else /* CONFIG_405EP */ | |
| 55 | unsigned char bi_enetaddr[6]; /* Local Ethernet MAC address */ | |
| 56 | #endif /* CONFIG_405EP */ | |
| 57 | unsigned char bi_pci_enetaddr[6]; /* PCI Ethernet MAC address */ | |
| 58 | unsigned int bi_intfreq; /* Processor speed, in Hz */ | |
| 59 | unsigned int bi_busfreq; /* PLB Bus speed, in Hz */ | |
| 60 | unsigned int bi_pci_busfreq; /* PCI Bus speed, in Hz */ | |
| 61 | #ifdef CONFIG_405EP | |
| 62 | unsigned int bi_opb_busfreq; /* OPB Bus speed, in Hz */ | |
| 63 | unsigned int bi_pllouta_freq; /* PLL OUTA speed, in Hz */ | |
| 64 | #endif /* CONFIG_405EP */ | |
| 65 | } openbios_bd_t; | |
| 66 | ||
| 1da177e4 LT |
67 | void * |
| 68 | load_kernel(unsigned long load_addr, int num_words, unsigned long cksum, | |
| 69 | void *ign1, void *ign2) | |
| 70 | { | |
| 3e9e7c1d MP |
71 | #ifdef CONFIG_40x |
| 72 | openbios_bd_t *openbios_bd = NULL; | |
| 73 | openbios_bd_t *(*get_board_info)(void) = | |
| 74 | (openbios_bd_t *(*)(void))(*(unsigned long *)BOARD_INFO_VECTOR); | |
| 75 | ||
| 76 | /* | |
| 77 | * On 40x platforms we not only need the MAC-addresses, but also the | |
| 78 | * clocks and memsize. Now try to get all values using the OpenBIOS | |
| 79 | * "get_board_info()" callback. | |
| 80 | */ | |
| 81 | if ((openbios_bd = get_board_info()) != NULL) { | |
| 82 | /* | |
| 83 | * Copy bd_info from OpenBIOS struct into U-Boot struct | |
| 84 | * used by kernel | |
| 85 | */ | |
| 86 | hold_residual->bi_memsize = openbios_bd->bi_memsize; | |
| 87 | hold_residual->bi_intfreq = openbios_bd->bi_intfreq; | |
| 88 | hold_residual->bi_busfreq = openbios_bd->bi_busfreq; | |
| 89 | hold_residual->bi_pci_busfreq = openbios_bd->bi_pci_busfreq; | |
| 90 | memcpy(hold_residual->bi_pci_enetaddr, openbios_bd->bi_pci_enetaddr, 6); | |
| 91 | #ifdef CONFIG_405EP | |
| 92 | memcpy(hold_residual->bi_enetaddr, openbios_bd->bi_enetaddr[0], 6); | |
| 93 | memcpy(hold_residual->bi_enet1addr, openbios_bd->bi_enetaddr[1], 6); | |
| 94 | hold_residual->bi_opbfreq = openbios_bd->bi_opb_busfreq; | |
| 95 | hold_residual->bi_procfreq = openbios_bd->bi_pllouta_freq; | |
| 96 | #else /* CONFIG_405EP */ | |
| 97 | memcpy(hold_residual->bi_enetaddr, openbios_bd->bi_enetaddr, 6); | |
| 98 | #endif /* CONFIG_405EP */ | |
| 99 | } else { | |
| 100 | /* Hmmm...better try to stuff some defaults. | |
| 101 | */ | |
| 102 | hold_residual->bi_memsize = 16 * 1024 * 1024; | |
| 103 | hold_residual->bi_intfreq = 200000000; | |
| 104 | hold_residual->bi_busfreq = 100000000; | |
| 105 | hold_residual->bi_pci_busfreq = 66666666; | |
| 106 | ||
| 107 | /* | |
| 108 | * Only supply one mac-address in this fallback | |
| 109 | */ | |
| 110 | memcpy(hold_residual->bi_enetaddr, (void *)def_enet_addr, 6); | |
| 111 | #ifdef CONFIG_405EP | |
| 112 | hold_residual->bi_opbfreq = 50000000; | |
| 113 | hold_residual->bi_procfreq = 200000000; | |
| 114 | #endif /* CONFIG_405EP */ | |
| 115 | } | |
| 1da177e4 | 116 | |
| 3e9e7c1d MP |
117 | timebase_period_ns = 1000000000 / hold_residual->bi_intfreq; |
| 118 | #endif /* CONFIG_40x */ | |
| 119 | ||
| 120 | #ifdef CONFIG_440GP | |
| 1da177e4 | 121 | /* simply copy the MAC addresses */ |
| 3e9e7c1d MP |
122 | memcpy(hold_residual->bi_enetaddr, (char *)OPENBIOS_MAC_BASE, 6); |
| 123 | memcpy(hold_residual->bi_enet1addr, (char *)(OPENBIOS_MAC_BASE+OPENBIOS_MAC_OFFSET), 6); | |
| 124 | #endif /* CONFIG_440GP */ | |
| 125 | ||
| 126 | decompress_kernel(load_addr, num_words, cksum); | |
| 1da177e4 LT |
127 | |
| 128 | return (void *)hold_residual; | |
| 129 | } |