patch-2.4.22 linux-2.4.22/arch/mips/lasat/prom.c

• Lines: 141
• Date: 2003-08-25 04:44:40.000000000 -0700
• Orig file: linux-2.4.21/arch/mips/lasat/prom.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/mips/lasat/prom.c linux-2.4.22/arch/mips/lasat/prom.c
@@ -0,0 +1,140 @@
+/*
+ * PROM interface routines.
+ */
+#include <linux/types.h>
+#include <linux/config.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_printf(const char * fmt, ...)
+{
+}
+
+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_printf)(const char * fmt, ...) = null_prom_printf;
+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;
+
+#define PROM_PRINTFBUF_SIZE 256
+static char prom_printfbuf[PROM_PRINTFBUF_SIZE];
+
+static void real_prom_printf(const char * fmt, ...)
+{
+	va_list ap;
+	int len;
+	char *c = prom_printfbuf;
+	int i;
+
+	va_start(ap, fmt);
+	len = vsnprintf(prom_printfbuf, PROM_PRINTFBUF_SIZE, fmt, ap);
+	va_end(ap);
+
+	/* output overflowed the buffer */
+	if (len < 0 || len > PROM_PRINTFBUF_SIZE)
+		len = PROM_PRINTFBUF_SIZE;
+
+	for (i=0; i < len; i++) {
+		if (*c == '\n')
+			prom_putc('\r');
+		prom_putc(*c++);
+	}
+}
+
+static void setup_prom_vectors(void)
+{
+	u32 version = *(u32 *)(RESET_VECTOR + 0x90);
+
+	if (version == 306) {
+		prom_display = (void *)PROM_DISPLAY_ADDR;
+		prom_putc = (void *)PROM_PUTC_ADDR;
+		prom_printf = real_prom_printf;
+		prom_monitor = (void *)PROM_MONITOR_ADDR;
+	}
+	prom_printf("prom vectors set up\n");
+}
+
+char arcs_cmdline[CL_SIZE];
+
+static struct at93c_defs at93c_defs[N_MACHTYPES] = {
+	{(void *)AT93C_REG_100, (void *)AT93C_RDATA_REG_100, AT93C_RDATA_SHIFT_100,
+	AT93C_WDATA_SHIFT_100, AT93C_CS_M_100, AT93C_CLK_M_100},
+	{(void *)AT93C_REG_200, (void *)AT93C_RDATA_REG_200, AT93C_RDATA_SHIFT_200,
+	AT93C_WDATA_SHIFT_200, AT93C_CS_M_200, AT93C_CLK_M_200},
+};
+
+void __init prom_init(int argc, char **argv, char **envp, int *prom_vec)
+{
+	setup_prom_vectors();
+
+	if (current_cpu_data.cputype == CPU_R5000) {
+		mips_machtype = MACH_LASAT_200;
+		lasat_ndelay_divider = 8;
+	} else {
+		mips_machtype = MACH_LASAT_100;
+		lasat_ndelay_divider = 20;
+	}
+
+	at93c = &at93c_defs[mips_machtype];
+
+	lasat_init_board_info();		/* Read info from EEPROM */
+
+	mips_machgroup = MACH_GROUP_LASAT;
+
+	/* Get the command line */
+	if (argc>0) {
+		strncpy(arcs_cmdline, argv[0], CL_SIZE-1);
+		arcs_cmdline[CL_SIZE-1] = '\0';
+	}
+
+	/* Set the I/O base address */
+	set_io_port_base(KSEG1);
+
+	/* Set memory regions */
+	ioport_resource.start = 0;		/* Should be KSEGx ???	*/
+	ioport_resource.end = 0xffffffff;	/* Should be ???	*/
+
+	add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM);
+}
+
+void prom_free_prom_memory(void)
+{
+}
+
+const char *get_system_type(void)
+{
+	return lasat_board_info.li_bmstr;
+}