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>
23 #include <linux/initrd.h>
25 #include <asm/ibm44x.h>
27 #include <asm/machdep.h>
29 #include <asm/ppc4xx_pic.h>
30 #include <asm/param.h>
31 #include <asm/bootinfo.h>
32 #include <asm/ppcboot.h>
34 #include <syslib/gen550.h>
36 /* Global Variables */
39 phys_addr_t fixup_bigphys_addr(phys_addr_t addr, phys_addr_t size)
41 phys_addr_t page_4gb = 0;
44 * Trap the least significant 32-bit portions of an
45 * address in the 440's 36-bit address space. Fix
46 * them up with the appropriate ERPN
48 if ((addr >= PPC44x_IO_LO) && (addr <= PPC44x_IO_HI))
49 page_4gb = PPC44x_IO_PAGE;
50 else if ((addr >= PPC44x_PCI0CFG_LO) && (addr <= PPC44x_PCI0CFG_HI))
51 page_4gb = PPC44x_PCICFG_PAGE;
53 else if ((addr >= PPC44x_PCI1CFG_LO) && (addr <= PPC44x_PCI1CFG_HI))
54 page_4gb = PPC44x_PCICFG_PAGE;
55 else if ((addr >= PPC44x_PCI2CFG_LO) && (addr <= PPC44x_PCI2CFG_HI))
56 page_4gb = PPC44x_PCICFG_PAGE;
58 else if ((addr >= PPC44x_PCIMEM_LO) && (addr <= PPC44x_PCIMEM_HI))
59 page_4gb = PPC44x_PCIMEM_PAGE;
61 return (page_4gb | addr);
63 EXPORT_SYMBOL(fixup_bigphys_addr);
65 void __init ibm44x_calibrate_decr(unsigned int freq)
67 tb_ticks_per_jiffy = freq / HZ;
68 tb_to_us = mulhwu_scale_factor(freq, 1000000);
70 /* Set the time base to zero */
74 /* Clear any pending timer interrupts */
75 mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
77 /* Enable decrementer interrupt */
78 mtspr(SPRN_TCR, TCR_DIE);
81 extern void abort(void);
83 static void ibm44x_restart(char *cmd)
89 static void ibm44x_power_off(void)
95 static void ibm44x_halt(void)
102 * Read the 44x memory controller to get size of system memory.
104 static unsigned long __init ibm44x_find_end_of_memory(void)
114 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B0CR);
117 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B1CR);
120 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B2CR);
123 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B3CR);
127 bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
129 if (!(bank_config & SDRAM_CONFIG_BANK_ENABLE))
131 switch (SDRAM_CONFIG_BANK_SIZE(bank_config))
133 case SDRAM_CONFIG_SIZE_8M:
134 mem_size += PPC44x_MEM_SIZE_8M;
136 case SDRAM_CONFIG_SIZE_16M:
137 mem_size += PPC44x_MEM_SIZE_16M;
139 case SDRAM_CONFIG_SIZE_32M:
140 mem_size += PPC44x_MEM_SIZE_32M;
142 case SDRAM_CONFIG_SIZE_64M:
143 mem_size += PPC44x_MEM_SIZE_64M;
145 case SDRAM_CONFIG_SIZE_128M:
146 mem_size += PPC44x_MEM_SIZE_128M;
148 case SDRAM_CONFIG_SIZE_256M:
149 mem_size += PPC44x_MEM_SIZE_256M;
151 case SDRAM_CONFIG_SIZE_512M:
152 mem_size += PPC44x_MEM_SIZE_512M;
159 void __init ibm44x_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
160 unsigned long r6, unsigned long r7)
162 parse_bootinfo(find_bootinfo());
165 * If we were passed in a board information, copy it into the
166 * residual data area.
169 __res = *(bd_t *)(r3 + KERNELBASE);
171 #if defined(CONFIG_BLK_DEV_INITRD)
173 * If the init RAM disk has been configured in, and there's a valid
174 * starting address for it, set it up.
177 initrd_start = r4 + KERNELBASE;
178 initrd_end = r5 + KERNELBASE;
180 #endif /* CONFIG_BLK_DEV_INITRD */
182 /* Copy the kernel command line arguments to a safe place. */
185 *(char *) (r7 + KERNELBASE) = 0;
186 strcpy(cmd_line, (char *) (r6 + KERNELBASE));
189 ppc_md.init_IRQ = ppc4xx_pic_init;
190 ppc_md.find_end_of_memory = ibm44x_find_end_of_memory;
191 ppc_md.restart = ibm44x_restart;
192 ppc_md.power_off = ibm44x_power_off;
193 ppc_md.halt = ibm44x_halt;
195 #ifdef CONFIG_SERIAL_TEXT_DEBUG
196 ppc_md.progress = gen550_progress;
197 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
199 ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
203 * The Abatron BDI JTAG debugger does not tolerate others
204 * mucking with the debug registers.
206 #if !defined(CONFIG_BDI_SWITCH)
207 /* Enable internal debug mode */
208 mtspr(SPRN_DBCR0, (DBCR0_IDM));
210 /* Clear any residual debug events */
211 mtspr(SPRN_DBSR, 0xffffffff);
215 /* Called from machine_check_exception */
216 void platform_machine_check(struct pt_regs *regs)
218 #if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
219 printk("PLB0: BEAR=0x%08x%08x ACR= 0x%08x BESR= 0x%08x%08x\n",
220 mfdcr(DCRN_PLB0_BEARH), mfdcr(DCRN_PLB0_BEARL),
221 mfdcr(DCRN_PLB0_ACR), mfdcr(DCRN_PLB0_BESRH),
222 mfdcr(DCRN_PLB0_BESRL));
223 printk("PLB1: BEAR=0x%08x%08x ACR= 0x%08x BESR= 0x%08x%08x\n",
224 mfdcr(DCRN_PLB1_BEARH), mfdcr(DCRN_PLB1_BEARL),
225 mfdcr(DCRN_PLB1_ACR), mfdcr(DCRN_PLB1_BESRH),
226 mfdcr(DCRN_PLB1_BESRL));
228 printk("PLB0: BEAR=0x%08x%08x ACR= 0x%08x BESR= 0x%08x\n",
229 mfdcr(DCRN_PLB0_BEARH), mfdcr(DCRN_PLB0_BEARL),
230 mfdcr(DCRN_PLB0_ACR), mfdcr(DCRN_PLB0_BESR));
232 printk("POB0: BEAR=0x%08x%08x BESR0=0x%08x BESR1=0x%08x\n",
233 mfdcr(DCRN_POB0_BEARH), mfdcr(DCRN_POB0_BEARL),
234 mfdcr(DCRN_POB0_BESR0), mfdcr(DCRN_POB0_BESR1));
235 printk("OPB0: BEAR=0x%08x%08x BSTAT=0x%08x\n",
236 mfdcr(DCRN_OPB0_BEARH), mfdcr(DCRN_OPB0_BEARL),
237 mfdcr(DCRN_OPB0_BSTAT));