2 * PPC44x system library
4 * Matt Porter <mporter@kernel.crashing.org>
5 * Copyright 2002-2005 MontaVista Software Inc.
7 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
8 * Copyright (c) 2003, 2004 Zultys Technologies
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
16 #include <linux/time.h>
17 #include <linux/types.h>
18 #include <linux/serial.h>
19 #include <linux/module.h>
20 #include <linux/initrd.h>
22 #include <asm/ibm44x.h>
24 #include <asm/machdep.h>
26 #include <asm/ppc4xx_pic.h>
27 #include <asm/param.h>
28 #include <asm/bootinfo.h>
29 #include <asm/ppcboot.h>
31 #include <syslib/gen550.h>
33 /* Global Variables */
36 phys_addr_t fixup_bigphys_addr(phys_addr_t addr, phys_addr_t size)
38 phys_addr_t page_4gb = 0;
41 * Trap the least significant 32-bit portions of an
42 * address in the 440's 36-bit address space. Fix
43 * them up with the appropriate ERPN
45 if ((addr >= PPC44x_IO_LO) && (addr <= PPC44x_IO_HI))
46 page_4gb = PPC44x_IO_PAGE;
47 else if ((addr >= PPC44x_PCI0CFG_LO) && (addr <= PPC44x_PCI0CFG_HI))
48 page_4gb = PPC44x_PCICFG_PAGE;
50 else if ((addr >= PPC44x_PCI1CFG_LO) && (addr <= PPC44x_PCI1CFG_HI))
51 page_4gb = PPC44x_PCICFG_PAGE;
52 else if ((addr >= PPC44x_PCI2CFG_LO) && (addr <= PPC44x_PCI2CFG_HI))
53 page_4gb = PPC44x_PCICFG_PAGE;
55 else if ((addr >= PPC44x_PCIMEM_LO) && (addr <= PPC44x_PCIMEM_HI))
56 page_4gb = PPC44x_PCIMEM_PAGE;
58 return (page_4gb | addr);
60 EXPORT_SYMBOL(fixup_bigphys_addr);
62 void __init ibm44x_calibrate_decr(unsigned int freq)
64 tb_ticks_per_jiffy = freq / HZ;
65 tb_to_us = mulhwu_scale_factor(freq, 1000000);
67 /* Set the time base to zero */
71 /* Clear any pending timer interrupts */
72 mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
74 /* Enable decrementer interrupt */
75 mtspr(SPRN_TCR, TCR_DIE);
78 extern void abort(void);
80 static void ibm44x_restart(char *cmd)
86 static void ibm44x_power_off(void)
92 static void ibm44x_halt(void)
99 * Read the 44x memory controller to get size of system memory.
101 static unsigned long __init ibm44x_find_end_of_memory(void)
111 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B0CR);
114 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B1CR);
117 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B2CR);
120 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B3CR);
124 bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
126 if (!(bank_config & SDRAM_CONFIG_BANK_ENABLE))
128 switch (SDRAM_CONFIG_BANK_SIZE(bank_config))
130 case SDRAM_CONFIG_SIZE_8M:
131 mem_size += PPC44x_MEM_SIZE_8M;
133 case SDRAM_CONFIG_SIZE_16M:
134 mem_size += PPC44x_MEM_SIZE_16M;
136 case SDRAM_CONFIG_SIZE_32M:
137 mem_size += PPC44x_MEM_SIZE_32M;
139 case SDRAM_CONFIG_SIZE_64M:
140 mem_size += PPC44x_MEM_SIZE_64M;
142 case SDRAM_CONFIG_SIZE_128M:
143 mem_size += PPC44x_MEM_SIZE_128M;
145 case SDRAM_CONFIG_SIZE_256M:
146 mem_size += PPC44x_MEM_SIZE_256M;
148 case SDRAM_CONFIG_SIZE_512M:
149 mem_size += PPC44x_MEM_SIZE_512M;
156 void __init ibm44x_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
157 unsigned long r6, unsigned long r7)
159 parse_bootinfo(find_bootinfo());
162 * If we were passed in a board information, copy it into the
163 * residual data area.
166 __res = *(bd_t *)(r3 + KERNELBASE);
168 #if defined(CONFIG_BLK_DEV_INITRD)
170 * If the init RAM disk has been configured in, and there's a valid
171 * starting address for it, set it up.
174 initrd_start = r4 + KERNELBASE;
175 initrd_end = r5 + KERNELBASE;
177 #endif /* CONFIG_BLK_DEV_INITRD */
179 /* Copy the kernel command line arguments to a safe place. */
182 *(char *) (r7 + KERNELBASE) = 0;
183 strcpy(cmd_line, (char *) (r6 + KERNELBASE));
186 ppc_md.init_IRQ = ppc4xx_pic_init;
187 ppc_md.find_end_of_memory = ibm44x_find_end_of_memory;
188 ppc_md.restart = ibm44x_restart;
189 ppc_md.power_off = ibm44x_power_off;
190 ppc_md.halt = ibm44x_halt;
192 #ifdef CONFIG_SERIAL_TEXT_DEBUG
193 ppc_md.progress = gen550_progress;
194 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
196 ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
200 * The Abatron BDI JTAG debugger does not tolerate others
201 * mucking with the debug registers.
203 #if !defined(CONFIG_BDI_SWITCH)
204 /* Enable internal debug mode */
205 mtspr(SPRN_DBCR0, (DBCR0_IDM));
207 /* Clear any residual debug events */
208 mtspr(SPRN_DBSR, 0xffffffff);
212 /* Called from machine_check_exception */
213 void platform_machine_check(struct pt_regs *regs)
215 #if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
216 printk("PLB0: BEAR=0x%08x%08x ACR= 0x%08x BESR= 0x%08x%08x\n",
217 mfdcr(DCRN_PLB0_BEARH), mfdcr(DCRN_PLB0_BEARL),
218 mfdcr(DCRN_PLB0_ACR), mfdcr(DCRN_PLB0_BESRH),
219 mfdcr(DCRN_PLB0_BESRL));
220 printk("PLB1: BEAR=0x%08x%08x ACR= 0x%08x BESR= 0x%08x%08x\n",
221 mfdcr(DCRN_PLB1_BEARH), mfdcr(DCRN_PLB1_BEARL),
222 mfdcr(DCRN_PLB1_ACR), mfdcr(DCRN_PLB1_BESRH),
223 mfdcr(DCRN_PLB1_BESRL));
225 printk("PLB0: BEAR=0x%08x%08x ACR= 0x%08x BESR= 0x%08x\n",
226 mfdcr(DCRN_PLB0_BEARH), mfdcr(DCRN_PLB0_BEARL),
227 mfdcr(DCRN_PLB0_ACR), mfdcr(DCRN_PLB0_BESR));
229 printk("POB0: BEAR=0x%08x%08x BESR0=0x%08x BESR1=0x%08x\n",
230 mfdcr(DCRN_POB0_BEARH), mfdcr(DCRN_POB0_BEARL),
231 mfdcr(DCRN_POB0_BESR0), mfdcr(DCRN_POB0_BESR1));
232 printk("OPB0: BEAR=0x%08x%08x BSTAT=0x%08x\n",
233 mfdcr(DCRN_OPB0_BEARH), mfdcr(DCRN_OPB0_BEARL),
234 mfdcr(DCRN_OPB0_BSTAT));