2 * arch/ppc/syslib/ibm44x_common.c
4 * PPC44x system library
6 * Matt Porter <mporter@kernel.crashing.org>
7 * Copyright 2002-2005 MontaVista Software Inc.
9 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
10 * Copyright (c) 2003, 2004 Zultys Technologies
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
18 #include <linux/config.h>
19 #include <linux/time.h>
20 #include <linux/types.h>
21 #include <linux/serial.h>
22 #include <linux/module.h>
24 #include <asm/ibm44x.h>
26 #include <asm/machdep.h>
28 #include <asm/ppc4xx_pic.h>
29 #include <asm/param.h>
30 #include <asm/bootinfo.h>
31 #include <asm/ppcboot.h>
33 #include <syslib/gen550.h>
35 /* Global Variables */
38 phys_addr_t fixup_bigphys_addr(phys_addr_t addr, phys_addr_t size)
40 phys_addr_t page_4gb = 0;
43 * Trap the least significant 32-bit portions of an
44 * address in the 440's 36-bit address space. Fix
45 * them up with the appropriate ERPN
47 if ((addr >= PPC44x_IO_LO) && (addr <= PPC44x_IO_HI))
48 page_4gb = PPC44x_IO_PAGE;
49 else if ((addr >= PPC44x_PCI0CFG_LO) && (addr <= PPC44x_PCI0CFG_HI))
50 page_4gb = PPC44x_PCICFG_PAGE;
52 else if ((addr >= PPC44x_PCI1CFG_LO) && (addr <= PPC44x_PCI1CFG_HI))
53 page_4gb = PPC44x_PCICFG_PAGE;
54 else if ((addr >= PPC44x_PCI2CFG_LO) && (addr <= PPC44x_PCI2CFG_HI))
55 page_4gb = PPC44x_PCICFG_PAGE;
57 else if ((addr >= PPC44x_PCIMEM_LO) && (addr <= PPC44x_PCIMEM_HI))
58 page_4gb = PPC44x_PCIMEM_PAGE;
60 return (page_4gb | addr);
62 EXPORT_SYMBOL(fixup_bigphys_addr);
64 void __init ibm44x_calibrate_decr(unsigned int freq)
66 tb_ticks_per_jiffy = freq / HZ;
67 tb_to_us = mulhwu_scale_factor(freq, 1000000);
69 /* Set the time base to zero */
73 /* Clear any pending timer interrupts */
74 mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
76 /* Enable decrementer interrupt */
77 mtspr(SPRN_TCR, TCR_DIE);
80 extern void abort(void);
82 static void ibm44x_restart(char *cmd)
88 static void ibm44x_power_off(void)
94 static void ibm44x_halt(void)
101 * Read the 44x memory controller to get size of system memory.
103 static unsigned long __init ibm44x_find_end_of_memory(void)
113 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B0CR);
116 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B1CR);
119 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B2CR);
122 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B3CR);
126 bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
128 if (!(bank_config & SDRAM_CONFIG_BANK_ENABLE))
130 switch (SDRAM_CONFIG_BANK_SIZE(bank_config))
132 case SDRAM_CONFIG_SIZE_8M:
133 mem_size += PPC44x_MEM_SIZE_8M;
135 case SDRAM_CONFIG_SIZE_16M:
136 mem_size += PPC44x_MEM_SIZE_16M;
138 case SDRAM_CONFIG_SIZE_32M:
139 mem_size += PPC44x_MEM_SIZE_32M;
141 case SDRAM_CONFIG_SIZE_64M:
142 mem_size += PPC44x_MEM_SIZE_64M;
144 case SDRAM_CONFIG_SIZE_128M:
145 mem_size += PPC44x_MEM_SIZE_128M;
147 case SDRAM_CONFIG_SIZE_256M:
148 mem_size += PPC44x_MEM_SIZE_256M;
150 case SDRAM_CONFIG_SIZE_512M:
151 mem_size += PPC44x_MEM_SIZE_512M;
158 void __init ibm44x_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
159 unsigned long r6, unsigned long r7)
161 parse_bootinfo(find_bootinfo());
164 * If we were passed in a board information, copy it into the
165 * residual data area.
168 __res = *(bd_t *)(r3 + KERNELBASE);
170 #if defined(CONFIG_BLK_DEV_INITRD)
172 * If the init RAM disk has been configured in, and there's a valid
173 * starting address for it, set it up.
176 initrd_start = r4 + KERNELBASE;
177 initrd_end = r5 + KERNELBASE;
179 #endif /* CONFIG_BLK_DEV_INITRD */
181 /* Copy the kernel command line arguments to a safe place. */
184 *(char *) (r7 + KERNELBASE) = 0;
185 strcpy(cmd_line, (char *) (r6 + KERNELBASE));
188 ppc_md.init_IRQ = ppc4xx_pic_init;
189 ppc_md.find_end_of_memory = ibm44x_find_end_of_memory;
190 ppc_md.restart = ibm44x_restart;
191 ppc_md.power_off = ibm44x_power_off;
192 ppc_md.halt = ibm44x_halt;
194 #ifdef CONFIG_SERIAL_TEXT_DEBUG
195 ppc_md.progress = gen550_progress;
196 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
198 ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
202 * The Abatron BDI JTAG debugger does not tolerate others
203 * mucking with the debug registers.
205 #if !defined(CONFIG_BDI_SWITCH)
206 /* Enable internal debug mode */
207 mtspr(SPRN_DBCR0, (DBCR0_IDM));
209 /* Clear any residual debug events */
210 mtspr(SPRN_DBSR, 0xffffffff);
214 /* Called from machine_check_exception */
215 void platform_machine_check(struct pt_regs *regs)
217 printk("PLB0: BEAR=0x%08x%08x ACR= 0x%08x BESR= 0x%08x\n",
218 mfdcr(DCRN_PLB0_BEARH), mfdcr(DCRN_PLB0_BEARL),
219 mfdcr(DCRN_PLB0_ACR), mfdcr(DCRN_PLB0_BESR));
220 printk("POB0: BEAR=0x%08x%08x BESR0=0x%08x BESR1=0x%08x\n",
221 mfdcr(DCRN_POB0_BEARH), mfdcr(DCRN_POB0_BEARL),
222 mfdcr(DCRN_POB0_BESR0), mfdcr(DCRN_POB0_BESR1));
223 printk("OPB0: BEAR=0x%08x%08x BSTAT=0x%08x\n",
224 mfdcr(DCRN_OPB0_BEARH), mfdcr(DCRN_OPB0_BEARL),
225 mfdcr(DCRN_OPB0_BSTAT));