~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c

Version: ~ [ linux-5.8 ] ~ [ linux-5.7.14 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.57 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.138 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.193 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.232 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.232 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * mpc7448_hpc2.c
  3  *
  4  * Board setup routines for the Freescale mpc7448hpc2(taiga) platform
  5  *
  6  * Author: Jacob Pan
  7  *       jacob.pan@freescale.com
  8  * Author: Xianghua Xiao
  9  *       x.xiao@freescale.com
 10  * Maintainer: Roy Zang <tie-fei.zang@freescale.com>
 11  *      Add Flat Device Tree support fot mpc7448hpc2 board
 12  *
 13  * Copyright 2004-2006 Freescale Semiconductor, Inc.
 14  *
 15  * This program is free software; you can redistribute it and/or
 16  * modify it under the terms of the GNU General Public License
 17  * as published by the Free Software Foundation; either version
 18  * 2 of the License, or (at your option) any later version.
 19  */
 20 
 21 #include <linux/stddef.h>
 22 #include <linux/kernel.h>
 23 #include <linux/pci.h>
 24 #include <linux/kdev_t.h>
 25 #include <linux/console.h>
 26 #include <linux/module.h>
 27 #include <linux/delay.h>
 28 #include <linux/irq.h>
 29 #include <linux/seq_file.h>
 30 #include <linux/root_dev.h>
 31 #include <linux/serial.h>
 32 #include <linux/tty.h>
 33 #include <linux/serial_core.h>
 34 
 35 #include <asm/time.h>
 36 #include <asm/machdep.h>
 37 #include <asm/prom.h>
 38 #include <asm/udbg.h>
 39 #include <asm/tsi108.h>
 40 #include <asm/pci-bridge.h>
 41 #include <asm/reg.h>
 42 #include <mm/mmu_decl.h>
 43 #include <asm/tsi108_pci.h>
 44 #include <asm/tsi108_irq.h>
 45 #include <asm/mpic.h>
 46 
 47 #undef DEBUG
 48 #ifdef DEBUG
 49 #define DBG(fmt...) do { printk(fmt); } while(0)
 50 #else
 51 #define DBG(fmt...) do { } while(0)
 52 #endif
 53 
 54 #define MPC7448HPC2_PCI_CFG_PHYS 0xfb000000
 55 
 56 int mpc7448_hpc2_exclude_device(struct pci_controller *hose,
 57                                 u_char bus, u_char devfn)
 58 {
 59         if (bus == 0 && PCI_SLOT(devfn) == 0)
 60                 return PCIBIOS_DEVICE_NOT_FOUND;
 61         else
 62                 return PCIBIOS_SUCCESSFUL;
 63 }
 64 
 65 static void __init mpc7448_hpc2_setup_arch(void)
 66 {
 67         struct device_node *np;
 68         if (ppc_md.progress)
 69                 ppc_md.progress("mpc7448_hpc2_setup_arch():set_bridge", 0);
 70 
 71         tsi108_csr_vir_base = get_vir_csrbase();
 72 
 73         /* setup PCI host bridge */
 74 #ifdef CONFIG_PCI
 75         for_each_compatible_node(np, "pci", "tsi108-pci")
 76                 tsi108_setup_pci(np, MPC7448HPC2_PCI_CFG_PHYS, 0);
 77 
 78         ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device;
 79         if (ppc_md.progress)
 80                 ppc_md.progress("tsi108: resources set", 0x100);
 81 #endif
 82 
 83         printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n");
 84         printk(KERN_INFO
 85                "Jointly ported by Freescale and Tundra Semiconductor\n");
 86         printk(KERN_INFO
 87                "Enabling L2 cache then enabling the HID0 prefetch engine.\n");
 88 }
 89 
 90 /*
 91  * Interrupt setup and service.  Interrupts on the mpc7448_hpc2 come
 92  * from the four external INT pins, PCI interrupts are routed via
 93  * PCI interrupt control registers, it generates internal IRQ23
 94  *
 95  * Interrupt routing on the Taiga Board:
 96  * TSI108:PB_INT[0] -> CPU0:INT#
 97  * TSI108:PB_INT[1] -> CPU0:MCP#
 98  * TSI108:PB_INT[2] -> N/C
 99  * TSI108:PB_INT[3] -> N/C
100  */
101 static void __init mpc7448_hpc2_init_IRQ(void)
102 {
103         struct mpic *mpic;
104 #ifdef CONFIG_PCI
105         unsigned int cascade_pci_irq;
106         struct device_node *tsi_pci;
107         struct device_node *cascade_node = NULL;
108 #endif
109 
110         mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
111                         MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
112                         24, 0,
113                         "Tsi108_PIC");
114 
115         BUG_ON(mpic == NULL);
116 
117         mpic_assign_isu(mpic, 0, mpic->paddr + 0x100);
118 
119         mpic_init(mpic);
120 
121 #ifdef CONFIG_PCI
122         tsi_pci = of_find_node_by_type(NULL, "pci");
123         if (tsi_pci == NULL) {
124                 printk("%s: No tsi108 pci node found !\n", __func__);
125                 return;
126         }
127         cascade_node = of_find_node_by_type(NULL, "pic-router");
128         if (cascade_node == NULL) {
129                 printk("%s: No tsi108 pci cascade node found !\n", __func__);
130                 return;
131         }
132 
133         cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0);
134         DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __func__,
135             (u32) cascade_pci_irq);
136         tsi108_pci_int_init(cascade_node);
137         irq_set_handler_data(cascade_pci_irq, mpic);
138         irq_set_chained_handler(cascade_pci_irq, tsi108_irq_cascade);
139 #endif
140         /* Configure MPIC outputs to CPU0 */
141         tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0);
142 }
143 
144 void mpc7448_hpc2_show_cpuinfo(struct seq_file *m)
145 {
146         seq_printf(m, "vendor\t\t: Freescale Semiconductor\n");
147 }
148 
149 void mpc7448_hpc2_restart(char *cmd)
150 {
151         local_irq_disable();
152 
153         /* Set exception prefix high - to the firmware */
154         _nmask_and_or_msr(0, MSR_IP);
155 
156         for (;;) ;              /* Spin until reset happens */
157 }
158 
159 void mpc7448_hpc2_power_off(void)
160 {
161         local_irq_disable();
162         for (;;) ;              /* No way to shut power off with software */
163 }
164 
165 void mpc7448_hpc2_halt(void)
166 {
167         mpc7448_hpc2_power_off();
168 }
169 
170 /*
171  * Called very early, device-tree isn't unflattened
172  */
173 static int __init mpc7448_hpc2_probe(void)
174 {
175         unsigned long root = of_get_flat_dt_root();
176 
177         if (!of_flat_dt_is_compatible(root, "mpc74xx"))
178                 return 0;
179         return 1;
180 }
181 
182 static int mpc7448_machine_check_exception(struct pt_regs *regs)
183 {
184         const struct exception_table_entry *entry;
185 
186         /* Are we prepared to handle this fault */
187         if ((entry = search_exception_tables(regs->nip)) != NULL) {
188                 tsi108_clear_pci_cfg_error();
189                 regs->msr |= MSR_RI;
190                 regs->nip = entry->fixup;
191                 return 1;
192         }
193         return 0;
194 }
195 
196 define_machine(mpc7448_hpc2){
197         .name                   = "MPC7448 HPC2",
198         .probe                  = mpc7448_hpc2_probe,
199         .setup_arch             = mpc7448_hpc2_setup_arch,
200         .init_IRQ               = mpc7448_hpc2_init_IRQ,
201         .show_cpuinfo           = mpc7448_hpc2_show_cpuinfo,
202         .get_irq                = mpic_get_irq,
203         .restart                = mpc7448_hpc2_restart,
204         .calibrate_decr         = generic_calibrate_decr,
205         .machine_check_exception= mpc7448_machine_check_exception,
206         .progress               = udbg_progress,
207 };
208 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp