* Matt Porter <mporter@mvista.com>
* Copyright 2002-2003 MontaVista Software Inc.
*
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ * Copyright (c) 2003, 2004 Zultys Technologies
+ *
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
*/
#include <linux/config.h>
#include <linux/types.h>
+#include <linux/serial.h>
+
+#include <asm/param.h>
#include <asm/ibm44x.h>
#include <asm/mmu.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/ppc4xx_pic.h>
phys_addr_t fixup_bigphys_addr(phys_addr_t addr, phys_addr_t size)
{
return (page_4gb | addr);
};
+
+void __init ibm44x_calibrate_decr(unsigned int freq)
+{
+ tb_ticks_per_jiffy = freq / HZ;
+ tb_to_us = mulhwu_scale_factor(freq, 1000000);
+
+ /* Set the time base to zero */
+ mtspr(SPRN_TBWL, 0);
+ mtspr(SPRN_TBWU, 0);
+
+ /* Clear any pending timer interrupts */
+ mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
+
+ /* Enable decrementer interrupt */
+ mtspr(SPRN_TCR, TCR_DIE);
+}
+
+extern void abort(void);
+
+static void ibm44x_restart(char *cmd)
+{
+ local_irq_disable();
+ abort();
+}
+
+static void ibm44x_power_off(void)
+{
+ local_irq_disable();
+ for(;;);
+}
+
+static void ibm44x_halt(void)
+{
+ local_irq_disable();
+ for(;;);
+}
+
+/*
+ * Read the 44x memory controller to get size of system memory.
+ */
+static unsigned long __init ibm44x_find_end_of_memory(void)
+{
+ u32 i, bank_config;
+ u32 mem_size = 0;
+
+ for (i=0; i<4; i++)
+ {
+ switch (i)
+ {
+ case 0:
+ mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B0CR);
+ break;
+ case 1:
+ mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B1CR);
+ break;
+ case 2:
+ mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B2CR);
+ break;
+ case 3:
+ mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B3CR);
+ break;
+ }
+
+ bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
+
+ if (!(bank_config & SDRAM_CONFIG_BANK_ENABLE))
+ continue;
+ switch (SDRAM_CONFIG_BANK_SIZE(bank_config))
+ {
+ case SDRAM_CONFIG_SIZE_8M:
+ mem_size += PPC44x_MEM_SIZE_8M;
+ break;
+ case SDRAM_CONFIG_SIZE_16M:
+ mem_size += PPC44x_MEM_SIZE_16M;
+ break;
+ case SDRAM_CONFIG_SIZE_32M:
+ mem_size += PPC44x_MEM_SIZE_32M;
+ break;
+ case SDRAM_CONFIG_SIZE_64M:
+ mem_size += PPC44x_MEM_SIZE_64M;
+ break;
+ case SDRAM_CONFIG_SIZE_128M:
+ mem_size += PPC44x_MEM_SIZE_128M;
+ break;
+ case SDRAM_CONFIG_SIZE_256M:
+ mem_size += PPC44x_MEM_SIZE_256M;
+ break;
+ case SDRAM_CONFIG_SIZE_512M:
+ mem_size += PPC44x_MEM_SIZE_512M;
+ break;
+ }
+ }
+ return mem_size;
+}
+
+static void __init ibm44x_init_irq(void)
+{
+ int i;
+
+ ppc4xx_pic_init();
+
+ for (i = 0; i < NR_IRQS; i++)
+ irq_desc[i].handler = ppc4xx_pic;
+}
+
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+#include <linux/serialP.h>
+#include <linux/serial_reg.h>
+#include <asm/serial.h>
+
+static struct serial_state rs_table[RS_TABLE_SIZE] = {
+ SERIAL_PORT_DFNS /* Defined in <asm/serial.h> */
+};
+
+static void ibm44x_progress(char *s, unsigned short hex)
+{
+ volatile char c;
+ volatile unsigned long com_port;
+ u16 shift;
+
+ com_port = (unsigned long)rs_table[0].iomem_base;
+ shift = rs_table[0].iomem_reg_shift;
+
+ while ((c = *s++) != 0) {
+ while ((*((volatile unsigned char *)com_port +
+ (UART_LSR << shift)) & UART_LSR_THRE) == 0)
+ ;
+ *(volatile unsigned char *)com_port = c;
+
+ }
+
+ /* Send LF/CR to pretty up output */
+ while ((*((volatile unsigned char *)com_port +
+ (UART_LSR << shift)) & UART_LSR_THRE) == 0)
+ ;
+ *(volatile unsigned char *)com_port = '\r';
+ while ((*((volatile unsigned char *)com_port +
+ (UART_LSR << shift)) & UART_LSR_THRE) == 0)
+ ;
+ *(volatile unsigned char *)com_port = '\n';
+}
+#endif /* CONFIG_SERIAL_TEXT_DEBUG */
+
+void __init ibm44x_platform_init(void)
+{
+ ppc_md.init_IRQ = ibm44x_init_irq;
+ ppc_md.find_end_of_memory = ibm44x_find_end_of_memory;
+ ppc_md.restart = ibm44x_restart;
+ ppc_md.power_off = ibm44x_power_off;
+ ppc_md.halt = ibm44x_halt;
+
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+ ppc_md.progress = ibm44x_progress;
+#endif /* CONFIG_SERIAL_TEXT_DEBUG */
+}
+