diff options
Diffstat (limited to 'arch/ppc/boot/simple/openbios.c')
| -rw-r--r-- | arch/ppc/boot/simple/openbios.c | 106 |
1 files changed, 100 insertions, 6 deletions
diff --git a/arch/ppc/boot/simple/openbios.c b/arch/ppc/boot/simple/openbios.c index c732b6d..81f11d8 100644 --- a/arch/ppc/boot/simple/openbios.c +++ b/arch/ppc/boot/simple/openbios.c @@ -1,19 +1,43 @@ /* * arch/ppc/boot/simple/openbios.c * - * 2005 (c) SYSGO AG - g.jaeger@sysgo.com + * 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. * - * Derived from arch/ppc/boot/simple/pibs.c (from MontaVista) */ #include <linux/types.h> #include <linux/config.h> #include <linux/string.h> #include <asm/ppcboot.h> -#include <platforms/4xx/ebony.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); @@ -23,15 +47,85 @@ extern unsigned long decompress_kernel(unsigned long load_addr, int num_words, 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) { - decompress_kernel(load_addr, num_words, cksum); +#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 *)EBONY_OPENBIOS_MAC_BASE, 6); - memcpy(hold_residual->bi_enet1addr, (char *)(EBONY_OPENBIOS_MAC_BASE+EBONY_OPENBIOS_MAC_OFFSET), 6); + 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; } |