2 * Copyright (c) 2005 DENX Software Engineering
3 * Stefan Roese <sr@denx.de>
5 * Based on original work by
6 * 2005 (c) SYSGO AG - g.jaeger@sysgo.com
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.
14 #include <linux/types.h>
15 #include <linux/config.h>
16 #include <linux/string.h>
17 #include <asm/ppcboot.h>
18 #include <asm/ibm4xx.h>
24 #if defined(CONFIG_BUBINGA)
25 #define BOARD_INFO_VECTOR 0xFFF80B50 /* openbios 1.19 moved this vector down - armin */
27 #define BOARD_INFO_VECTOR 0xFFFE0B50
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.
35 static ushort def_enet_addr
[] = { 0x0800, 0x3e26, 0x1559 };
37 extern unsigned long timebase_period_ns
;
38 #endif /* CONFIG_40x */
40 extern unsigned long decompress_kernel(unsigned long load_addr
, int num_words
,
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
;
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 */
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 */
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 */
68 load_kernel(unsigned long load_addr
, int num_words
, unsigned long cksum
,
69 void *ign1
, void *ign2
)
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
);
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.
81 if ((openbios_bd
= get_board_info()) != NULL
) {
83 * Copy bd_info from OpenBIOS struct into U-Boot struct
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);
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 */
100 /* Hmmm...better try to stuff some defaults.
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;
108 * Only supply one mac-address in this fallback
110 memcpy(hold_residual
->bi_enetaddr
, (void *)def_enet_addr
, 6);
112 hold_residual
->bi_opbfreq
= 50000000;
113 hold_residual
->bi_procfreq
= 200000000;
114 #endif /* CONFIG_405EP */
117 timebase_period_ns
= 1000000000 / hold_residual
->bi_intfreq
;
118 #endif /* CONFIG_40x */
121 /* simply copy the MAC addresses */
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 */
126 decompress_kernel(load_addr
, num_words
, cksum
);
128 return (void *)hold_residual
;
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