Eric Lee / smarc-fsl-linux-kernel

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arch/mips/lasat/prom.c 2.75 KB
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  /*
   * PROM interface routines.
   */
  #include <linux/types.h>
  #include <linux/init.h>
  #include <linux/string.h>
  #include <linux/ctype.h>
  #include <linux/kernel.h>
  #include <linux/mm.h>
  #include <linux/bootmem.h>
  #include <linux/ioport.h>
  #include <asm/bootinfo.h>
  #include <asm/lasat/lasat.h>
  #include <asm/cpu.h>
  
  #include "at93c.h"
  #include <asm/lasat/eeprom.h>
  #include "prom.h"
  
  #define RESET_VECTOR	0xbfc00000
  #define PROM_JUMP_TABLE_ENTRY(n) (*((u32 *)(RESET_VECTOR + 0x20) + n))
  #define PROM_DISPLAY_ADDR	PROM_JUMP_TABLE_ENTRY(0)
  #define PROM_PUTC_ADDR		PROM_JUMP_TABLE_ENTRY(1)
  #define PROM_MONITOR_ADDR	PROM_JUMP_TABLE_ENTRY(2)
  
  static void null_prom_display(const char *string, int pos, int clear)
  {
  }
  
  static void null_prom_monitor(void)
  {
  }
  
  static void null_prom_putc(char c)
  {
  }
  
  /* these are functions provided by the bootloader */
  static void (*__prom_putc)(char c) = null_prom_putc;
  
  void prom_putchar(char c)
  {
  	__prom_putc(c);
  }
  
  void (*prom_display)(const char *string, int pos, int clear) =
  		null_prom_display;
  void (*prom_monitor)(void) = null_prom_monitor;
  
  unsigned int lasat_ndelay_divider;
  
  static void setup_prom_vectors(void)
  {
  	u32 version = *(u32 *)(RESET_VECTOR + 0x90);
  
  	if (version >= 307) {
  		prom_display = (void *)PROM_DISPLAY_ADDR;
  		__prom_putc = (void *)PROM_PUTC_ADDR;
  		prom_monitor = (void *)PROM_MONITOR_ADDR;
  	}
  	printk(KERN_DEBUG "prom vectors set up
  ");
  }
  
  static struct at93c_defs at93c_defs[N_MACHTYPES] = {
  	{
  		.reg		= (void *)AT93C_REG_100,
  		.rdata_reg	= (void *)AT93C_RDATA_REG_100,
  		.rdata_shift	= AT93C_RDATA_SHIFT_100,
  		.wdata_shift	= AT93C_WDATA_SHIFT_100,
  		.cs		= AT93C_CS_M_100,
  		.clk		= AT93C_CLK_M_100
  	}, {
  		.reg		= (void *)AT93C_REG_200,
  		.rdata_reg	= (void *)AT93C_RDATA_REG_200,
  		.rdata_shift	= AT93C_RDATA_SHIFT_200,
  		.wdata_shift	= AT93C_WDATA_SHIFT_200,
  		.cs		= AT93C_CS_M_200,
  		.clk		= AT93C_CLK_M_200
  	},
  };
  
  void __init prom_init(void)
  {
  	int argc = fw_arg0;
  	char **argv = (char **) fw_arg1;
  
  	setup_prom_vectors();
b27418aa5   Thomas Bogendoerfer   [MIPS] Remove mip... 
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  	if (IS_LASAT_200()) {
1f21d2bde   Brian Murphy   [MIPS] Add back s... 
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  		printk(KERN_INFO "LASAT 200 board
  ");
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  		lasat_ndelay_divider = LASAT_200_DIVIDER;
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  		at93c = &at93c_defs[1];
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  	} else {
  		printk(KERN_INFO "LASAT 100 board
  ");
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  		lasat_ndelay_divider = LASAT_100_DIVIDER;
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  		at93c = &at93c_defs[0];
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  	}
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  	lasat_init_board_info();		/* Read info from EEPROM */
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  	/* Get the command line */
  	if (argc > 0) {
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  		strncpy(arcs_cmdline, argv[0], COMMAND_LINE_SIZE-1);
  		arcs_cmdline[COMMAND_LINE_SIZE-1] = '\0';
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  	}
  
  	/* Set the I/O base address */
  	set_io_port_base(KSEG1);
  
  	/* Set memory regions */
  	ioport_resource.start = 0;
  	ioport_resource.end = 0xffffffff;	/* Wrong, fixme.  */
  
  	add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM);
  }
  
  void __init prom_free_prom_memory(void)
  {
  }
  
  const char *get_system_type(void)
  {
  	return lasat_board_info.li_bmstr;
  }