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100 lines
2.3 KiB
100 lines
2.3 KiB
/* |
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* IP32 basic setup |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 2000 Harald Koerfgen |
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* Copyright (C) 2002, 2003, 2005 Ilya A. Volynets |
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* Copyright (C) 2006 Ralf Baechle <[email protected]> |
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*/ |
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#include <linux/console.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/param.h> |
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#include <linux/sched.h> |
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#include <asm/bootinfo.h> |
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#include <asm/mipsregs.h> |
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#include <asm/mmu_context.h> |
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#include <asm/sgialib.h> |
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#include <asm/time.h> |
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#include <asm/traps.h> |
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#include <asm/io.h> |
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#include <asm/ip32/crime.h> |
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#include <asm/ip32/mace.h> |
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#include <asm/ip32/ip32_ints.h> |
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extern void ip32_be_init(void); |
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extern void crime_init(void); |
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#ifdef CONFIG_SGI_O2MACE_ETH |
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/* |
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* This is taken care of in here 'cause they say using Arc later on is |
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* problematic |
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*/ |
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extern char o2meth_eaddr[8]; |
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static inline unsigned char str2hexnum(unsigned char c) |
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{ |
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if (c >= '0' && c <= '9') |
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return c - '0'; |
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if (c >= 'a' && c <= 'f') |
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return c - 'a' + 10; |
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return 0; /* foo */ |
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} |
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static inline void str2eaddr(unsigned char *ea, unsigned char *str) |
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{ |
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int i; |
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for (i = 0; i < 6; i++) { |
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unsigned char num; |
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if(*str == ':') |
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str++; |
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num = str2hexnum(*str++) << 4; |
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num |= (str2hexnum(*str++)); |
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ea[i] = num; |
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} |
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} |
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#endif |
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/* An arbitrary time; this can be decreased if reliability looks good */ |
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#define WAIT_MS 10 |
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void __init plat_time_init(void) |
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{ |
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printk(KERN_INFO "Calibrating system timer... "); |
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write_c0_count(0); |
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crime->timer = 0; |
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while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ; |
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mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS; |
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printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000); |
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} |
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void __init plat_mem_setup(void) |
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{ |
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board_be_init = ip32_be_init; |
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#ifdef CONFIG_SGI_O2MACE_ETH |
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{ |
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char *mac = ArcGetEnvironmentVariable("eaddr"); |
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str2eaddr(o2meth_eaddr, mac); |
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} |
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#endif |
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#if defined(CONFIG_SERIAL_CORE_CONSOLE) |
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{ |
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char* con = ArcGetEnvironmentVariable("console"); |
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if (con && *con == 'd') { |
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static char options[8] __initdata; |
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char *baud = ArcGetEnvironmentVariable("dbaud"); |
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if (baud) |
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strcpy(options, baud); |
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add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0, |
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baud ? options : NULL); |
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} |
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} |
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#endif |
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}
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