| /* |
| * 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; |
| } |