diff options
Diffstat (limited to 'arch/mips/mti-malta')
| -rw-r--r-- | arch/mips/mti-malta/Makefile | 21 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-amon.c | 80 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-cmdline.c | 59 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-console.c | 47 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-display.c | 64 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-init.c | 424 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-int.c | 712 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-kgdb.c | 133 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-memory.c | 177 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-mtd.c | 63 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-pci.c | 243 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-platform.c | 65 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-reset.c | 56 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-setup.c | 229 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-smtc.c | 154 | ||||
| -rw-r--r-- | arch/mips/mti-malta/malta-time.c | 163 |
16 files changed, 2690 insertions, 0 deletions
diff --git a/arch/mips/mti-malta/Makefile b/arch/mips/mti-malta/Makefile new file mode 100644 index 00000000000..f8064446e81 --- /dev/null +++ b/arch/mips/mti-malta/Makefile @@ -0,0 +1,21 @@ +# +# Carsten Langgaard, carstenl@mips.com +# Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. +# +# Copyright (C) 2008 Wind River Systems, Inc. +# written by Ralf Baechle <ralf@linux-mips.org> +# +obj-y := malta-amon.o malta-cmdline.o \ + malta-display.o malta-init.o malta-int.o \ + malta-memory.o malta-mtd.o \ + malta-platform.o malta-reset.o \ + malta-setup.o malta-time.o + +obj-$(CONFIG_EARLY_PRINTK) += malta-console.o +obj-$(CONFIG_PCI) += malta-pci.o +obj-$(CONFIG_KGDB) += malta-kgdb.o + +# FIXME FIXME FIXME +obj-$(CONFIG_MIPS_MT_SMTC) += malta_smtc.o + +EXTRA_CFLAGS += -Werror diff --git a/arch/mips/mti-malta/malta-amon.c b/arch/mips/mti-malta/malta-amon.c new file mode 100644 index 00000000000..96236bf3383 --- /dev/null +++ b/arch/mips/mti-malta/malta-amon.c @@ -0,0 +1,80 @@ +/* + * Copyright (C) 2007 MIPS Technologies, Inc. + * All rights reserved. + + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Arbitrary Monitor interface + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/smp.h> + +#include <asm-mips/addrspace.h> +#include <asm-mips/mips-boards/launch.h> +#include <asm-mips/mipsmtregs.h> + +int amon_cpu_avail(int cpu) +{ + struct cpulaunch *launch = (struct cpulaunch *)CKSEG0ADDR(CPULAUNCH); + + if (cpu < 0 || cpu >= NCPULAUNCH) { + pr_debug("avail: cpu%d is out of range\n", cpu); + return 0; + } + + launch += cpu; + if (!(launch->flags & LAUNCH_FREADY)) { + pr_debug("avail: cpu%d is not ready\n", cpu); + return 0; + } + if (launch->flags & (LAUNCH_FGO|LAUNCH_FGONE)) { + pr_debug("avail: too late.. cpu%d is already gone\n", cpu); + return 0; + } + + return 1; +} + +void amon_cpu_start(int cpu, + unsigned long pc, unsigned long sp, + unsigned long gp, unsigned long a0) +{ + volatile struct cpulaunch *launch = + (struct cpulaunch *)CKSEG0ADDR(CPULAUNCH); + + if (!amon_cpu_avail(cpu)) + return; + if (cpu == smp_processor_id()) { + pr_debug("launch: I am cpu%d!\n", cpu); + return; + } + launch += cpu; + + pr_debug("launch: starting cpu%d\n", cpu); + + launch->pc = pc; + launch->gp = gp; + launch->sp = sp; + launch->a0 = a0; + + /* Make sure target sees parameters before the go bit */ + smp_mb(); + + launch->flags |= LAUNCH_FGO; + while ((launch->flags & LAUNCH_FGONE) == 0) + ; + pr_debug("launch: cpu%d gone!\n", cpu); +} diff --git a/arch/mips/mti-malta/malta-cmdline.c b/arch/mips/mti-malta/malta-cmdline.c new file mode 100644 index 00000000000..1871c30ed2e --- /dev/null +++ b/arch/mips/mti-malta/malta-cmdline.c @@ -0,0 +1,59 @@ +/* + * Carsten Langgaard, carstenl@mips.com + * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Kernel command line creation using the prom monitor (YAMON) argc/argv. + */ +#include <linux/init.h> +#include <linux/string.h> + +#include <asm/bootinfo.h> + +extern int prom_argc; +extern int *_prom_argv; + +/* + * YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer. + * This macro take care of sign extension. + */ +#define prom_argv(index) ((char *)(long)_prom_argv[(index)]) + +char * __init prom_getcmdline(void) +{ + return &(arcs_cmdline[0]); +} + + +void __init prom_init_cmdline(void) +{ + char *cp; + int actr; + + actr = 1; /* Always ignore argv[0] */ + + cp = &(arcs_cmdline[0]); + while(actr < prom_argc) { + strcpy(cp, prom_argv(actr)); + cp += strlen(prom_argv(actr)); + *cp++ = ' '; + actr++; + } + if (cp != &(arcs_cmdline[0])) { + /* get rid of trailing space */ + --cp; + *cp = '\0'; + } +} diff --git a/arch/mips/mti-malta/malta-console.c b/arch/mips/mti-malta/malta-console.c new file mode 100644 index 00000000000..43bcfb4f816 --- /dev/null +++ b/arch/mips/mti-malta/malta-console.c @@ -0,0 +1,47 @@ +/* + * Carsten Langgaard, carstenl@mips.com + * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Putting things on the screen/serial line using YAMONs facilities. + */ +#include <linux/console.h> +#include <linux/init.h> +#include <linux/serial_reg.h> +#include <asm/io.h> + + +#define PORT(offset) (0x3f8 + (offset)) + + +static inline unsigned int serial_in(int offset) +{ + return inb(PORT(offset)); +} + +static inline void serial_out(int offset, int value) +{ + outb(value, PORT(offset)); +} + +int prom_putchar(char c) +{ + while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0) + ; + + serial_out(UART_TX, c); + + return 1; +} diff --git a/arch/mips/mti-malta/malta-display.c b/arch/mips/mti-malta/malta-display.c new file mode 100644 index 00000000000..7c8828fcb0a --- /dev/null +++ b/arch/mips/mti-malta/malta-display.c @@ -0,0 +1,64 @@ +/* + * Carsten Langgaard, carstenl@mips.com + * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Display routines for display messages in MIPS boards ascii display. + */ + +#include <linux/compiler.h> +#include <linux/timer.h> +#include <asm/io.h> +#include <asm/mips-boards/generic.h> +#include <asm/mips-boards/prom.h> + +extern const char display_string[]; +static unsigned int display_count; +static unsigned int max_display_count; + +void mips_display_message(const char *str) +{ + static unsigned int __iomem *display = NULL; + int i; + + if (unlikely(display == NULL)) + display = ioremap(ASCII_DISPLAY_POS_BASE, 16*sizeof(int)); + + for (i = 0; i <= 14; i=i+2) { + if (*str) + __raw_writel(*str++, display + i); + else + __raw_writel(' ', display + i); + } +} + +static void scroll_display_message(unsigned long data); +static DEFINE_TIMER(mips_scroll_timer, scroll_display_message, HZ, 0); + +static void scroll_display_message(unsigned long data) +{ + mips_display_message(&display_string[display_count++]); + if (display_count == max_display_count) + display_count = 0; + + mod_timer(&mips_scroll_timer, jiffies + HZ); +} + +void mips_scroll_message(void) +{ + del_timer_sync(&mips_scroll_timer); + max_display_count = strlen(display_string) + 1 - 8; + mod_timer(&mips_scroll_timer, jiffies + 1); +} diff --git a/arch/mips/mti-malta/malta-init.c b/arch/mips/mti-malta/malta-init.c new file mode 100644 index 00000000000..c0653021a17 --- /dev/null +++ b/arch/mips/mti-malta/malta-init.c @@ -0,0 +1,424 @@ +/* + * Copyright (C) 1999, 2000, 2004, 2005 MIPS Technologies, Inc. + * All rights reserved. + * Authors: Carsten Langgaard <carstenl@mips.com> + * Maciej W. Rozycki <macro@mips.com> + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * PROM library initialisation code. + */ +#include <linux/init.h> +#include <linux/string.h> +#include <linux/kernel.h> + +#include <asm/bootinfo.h> +#include <asm/gt64120.h> +#include <asm/io.h> +#include <asm/system.h> +#include <asm/cacheflush.h> +#include <asm/traps.h> + +#include <asm/mips-boards/prom.h> +#include <asm/mips-boards/generic.h> +#include <asm/mips-boards/bonito64.h> +#include <asm/mips-boards/msc01_pci.h> + +#include <asm/mips-boards/malta.h> + +#ifdef CONFIG_KGDB +extern int rs_kgdb_hook(int, int); +extern int rs_putDebugChar(char); +extern char rs_getDebugChar(void); +extern int saa9730_kgdb_hook(int); +extern int saa9730_putDebugChar(char); +extern char saa9730_getDebugChar(void); +#endif + +int prom_argc; +int *_prom_argv, *_prom_envp; + +/* + * YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer. + * This macro take care of sign extension, if running in 64-bit mode. + */ +#define prom_envp(index) ((char *)(long)_prom_envp[(index)]) + +int init_debug = 0; + +int mips_revision_corid; +int mips_revision_sconid; + +/* Bonito64 system controller register base. */ +unsigned long _pcictrl_bonito; +unsigned long _pcictrl_bonito_pcicfg; + +/* GT64120 system controller register base */ +unsigned long _pcictrl_gt64120; + +/* MIPS System controller register base */ +unsigned long _pcictrl_msc; + +char *prom_getenv(char *envname) +{ + /* + * Return a pointer to the given environment variable. + * In 64-bit mode: we're using 64-bit pointers, but all pointers + * in the PROM structures are only 32-bit, so we need some + * workarounds, if we are running in 64-bit mode. + */ + int i, index=0; + + i = strlen(envname); + + while (prom_envp(index)) { + if(strncmp(envname, prom_envp(index), i) == 0) { + return(prom_envp(index+1)); + } + index += 2; + } + + return NULL; +} + +static inline unsigned char str2hexnum(unsigned char c) +{ + if (c >= '0' && c <= '9') + return c - '0'; + if (c >= 'a' && c <= 'f') + return c - 'a' + 10; + return 0; /* foo */ +} + +static inline void str2eaddr(unsigned char *ea, unsigned char *str) +{ + int i; + + for (i = 0; i < 6; i++) { + unsigned char num; + + if((*str == '.') || (*str == ':')) + str++; + num = str2hexnum(*str++) << 4; + num |= (str2hexnum(*str++)); + ea[i] = num; + } +} + +int get_ethernet_addr(char *ethernet_addr) +{ + char *ethaddr_str; + + ethaddr_str = prom_getenv("ethaddr"); + if (!ethaddr_str) { + printk("ethaddr not set in boot prom\n"); + return -1; + } + str2eaddr(ethernet_addr, ethaddr_str); + + if (init_debug > 1) { + int i; + printk("get_ethernet_addr: "); + for (i=0; i<5; i++) + printk("%02x:", (unsigned char)*(ethernet_addr+i)); + printk("%02x\n", *(ethernet_addr+i)); + } + + return 0; +} + +#ifdef CONFIG_SERIAL_8250_CONSOLE +static void __init console_config(void) +{ + char console_string[40]; + int baud = 0; + char parity = '\0', bits = '\0', flow = '\0'; + char *s; + + if ((strstr(prom_getcmdline(), "console=")) == NULL) { + s = prom_getenv("modetty0"); + if (s) { + while (*s >= '0' && *s <= '9') + baud = baud*10 + *s++ - '0'; + if (*s == ',') s++; + if (*s) parity = *s++; + if (*s == ',') s++; + if (*s) bits = *s++; + if (*s == ',') s++; + if (*s == 'h') flow = 'r'; + } + if (baud == 0) + baud = 38400; + if (parity != 'n' && parity != 'o' && parity != 'e') + parity = 'n'; + if (bits != '7' && bits != '8') + bits = '8'; + if (flow == '\0') + flow = 'r'; + sprintf(console_string, " console=ttyS0,%d%c%c%c", baud, parity, bits, flow); + strcat(prom_getcmdline(), console_string); + pr_info("Config serial console:%s\n", console_string); + } +} +#endif + +#ifdef CONFIG_KGDB +void __init kgdb_config(void) +{ + extern int (*generic_putDebugChar)(char); + extern char (*generic_getDebugChar)(void); + char *argptr; + int line, speed; + + argptr = prom_getcmdline(); + if ((argptr = strstr(argptr, "kgdb=ttyS")) != NULL) { + argptr += strlen("kgdb=ttyS"); + if (*argptr != '0' && *argptr != '1') + printk("KGDB: Unknown serial line /dev/ttyS%c, " + "falling back to /dev/ttyS1\n", *argptr); + line = *argptr == '0' ? 0 : 1; + printk("KGDB: Using serial line /dev/ttyS%d for session\n", line); + + speed = 0; + if (*++argptr == ',') + { + int c; + while ((c = *++argptr) && ('0' <= c && c <= '9')) + speed = speed * 10 + c - '0'; + } + { + speed = rs_kgdb_hook(line, speed); + generic_putDebugChar = rs_putDebugChar; + generic_getDebugChar = rs_getDebugChar; + } + + pr_info("KGDB: Using serial line /dev/ttyS%d at %d for " + "session, please connect your debugger\n", + line ? 1 : 0, speed); + + { + char *s; + for (s = "Please connect GDB to this port\r\n"; *s; ) + generic_putDebugChar(*s++); + } + + /* Breakpoint is invoked after interrupts are initialised */ + } +} +#endif + +static void __init mips_nmi_setup(void) +{ + void *base; + extern char except_vec_nmi; + + base = cpu_has_veic ? + (void *)(CAC_BASE + 0xa80) : + (void *)(CAC_BASE + 0x380); + memcpy(base, &except_vec_nmi, 0x80); + flush_icache_range((unsigned long)base, (unsigned long)base + 0x80); +} + +static void __init mips_ejtag_setup(void) +{ + void *base; + extern char except_vec_ejtag_debug; + + base = cpu_has_veic ? + (void *)(CAC_BASE + 0xa00) : + (void *)(CAC_BASE + 0x300); + memcpy(base, &except_vec_ejtag_debug, 0x80); + flush_icache_range((unsigned long)base, (unsigned long)base + 0x80); +} + +extern struct plat_smp_ops msmtc_smp_ops; + +void __init prom_init(void) +{ + prom_argc = fw_arg0; + _prom_argv = (int *) fw_arg1; + _prom_envp = (int *) fw_arg2; + + mips_display_message("LINUX"); + + /* + * early setup of _pcictrl_bonito so that we can determine + * the system controller on a CORE_EMUL board + */ + _pcictrl_bonito = (unsigned long)ioremap(BONITO_REG_BASE, BONITO_REG_SIZE); + + mips_revision_corid = MIPS_REVISION_CORID; + + if (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL) { + if (BONITO_PCIDID == 0x0001df53 || + BONITO_PCIDID == 0x0003df53) + mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_BON; + else + mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_MSC; + } + + mips_revision_sconid = MIPS_REVISION_SCONID; + if (mips_revision_sconid == MIPS_REVISION_SCON_OTHER) { + switch (mips_revision_corid) { + case MIPS_REVISION_CORID_QED_RM5261: + case MIPS_REVISION_CORID_CORE_LV: + case MIPS_REVISION_CORID_CORE_FPGA: + case MIPS_REVISION_CORID_CORE_FPGAR2: + mips_revision_sconid = MIPS_REVISION_SCON_GT64120; + break; + case MIPS_REVISION_CORID_CORE_EMUL_BON: + case MIPS_REVISION_CORID_BONITO64: + case MIPS_REVISION_CORID_CORE_20K: + mips_revision_sconid = MIPS_REVISION_SCON_BONITO; + break; + case MIPS_REVISION_CORID_CORE_MSC: + case MIPS_REVISION_CORID_CORE_FPGA2: + case MIPS_REVISION_CORID_CORE_24K: + /* + * SOCit/ROCit support is essentially identical + * but make an attempt to distinguish them + */ + mips_revision_sconid = MIPS_REVISION_SCON_SOCIT; + break; + case MIPS_REVISION_CORID_CORE_FPGA3: + case MIPS_REVISION_CORID_CORE_FPGA4: + case MIPS_REVISION_CORID_CORE_FPGA5: + case MIPS_REVISION_CORID_CORE_EMUL_MSC: + default: + /* See above */ + mips_revision_sconid = MIPS_REVISION_SCON_ROCIT; + break; + } + } + + switch (mips_revision_sconid) { + u32 start, map, mask, data; + + case MIPS_REVISION_SCON_GT64120: + /* + * Setup the North bridge to do Master byte-lane swapping + * when running in bigendian. + */ + _pcictrl_gt64120 = (unsigned long)ioremap(MIPS_GT_BASE, 0x2000); + +#ifdef CONFIG_CPU_LITTLE_ENDIAN + GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT | + GT_PCI0_CMD_SBYTESWAP_BIT); +#else + GT_WRITE(GT_PCI0_CMD_OFS, 0); +#endif + /* Fix up PCI I/O mapping if necessary (for Atlas). */ + start = GT_READ(GT_PCI0IOLD_OFS); + map = GT_READ(GT_PCI0IOREMAP_OFS); + if ((start & map) != 0) { + map &= ~start; + GT_WRITE(GT_PCI0IOREMAP_OFS, map); + } + + set_io_port_base(MALTA_GT_PORT_BASE); + break; + + case MIPS_REVISION_SCON_BONITO: + _pcictrl_bonito_pcicfg = (unsigned long)ioremap(BONITO_PCICFG_BASE, BONITO_PCICFG_SIZE); + + /* + * Disable Bonito IOBC. + */ + BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG & + ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED | + BONITO_PCIMEMBASECFG_MEMBASE1_CACHED); + + /* + * Setup the North bridge to do Master byte-lane swapping + * when running in bigendian. + */ +#ifdef CONFIG_CPU_LITTLE_ENDIAN + BONITO_BONGENCFG = BONITO_BONGENCFG & + ~(BONITO_BONGENCFG_MSTRBYTESWAP | + BONITO_BONGENCFG_BYTESWAP); +#else + BONITO_BONGENCFG = BONITO_BONGENCFG | + BONITO_BONGENCFG_MSTRBYTESWAP | + BONITO_BONGENCFG_BYTESWAP; +#endif + + set_io_port_base(MALTA_BONITO_PORT_BASE); + break; + + case MIPS_REVISION_SCON_SOCIT: + case MIPS_REVISION_SCON_ROCIT: + _pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000); + mips_pci_controller: + mb(); + MSC_READ(MSC01_PCI_CFG, data); + MSC_WRITE(MSC01_PCI_CFG, data & ~MSC01_PCI_CFG_EN_BIT); + wmb(); + + /* Fix up lane swapping. */ +#ifdef CONFIG_CPU_LITTLE_ENDIAN + MSC_WRITE(MSC01_PCI_SWAP, MSC01_PCI_SWAP_NOSWAP); +#else + MSC_WRITE(MSC01_PCI_SWAP, + MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_IO_SHF | + MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_MEM_SHF | + MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_BAR0_SHF); +#endif + /* Fix up target memory mapping. */ + MSC_READ(MSC01_PCI_BAR0, mask); + MSC_WRITE(MSC01_PCI_P2SCMSKL, mask & MSC01_PCI_BAR0_SIZE_MSK); + + /* Don't handle target retries indefinitely. */ + if ((data & MSC01_PCI_CFG_MAXRTRY_MSK) == + MSC01_PCI_CFG_MAXRTRY_MSK) + data = (data & ~(MSC01_PCI_CFG_MAXRTRY_MSK << + MSC01_PCI_CFG_MAXRTRY_SHF)) | + ((MSC01_PCI_CFG_MAXRTRY_MSK - 1) << + MSC01_PCI_CFG_MAXRTRY_SHF); + + wmb(); + MSC_WRITE(MSC01_PCI_CFG, data); + mb(); + + set_io_port_base(MALTA_MSC_PORT_BASE); + break; + + case MIPS_REVISION_SCON_SOCITSC: + case MIPS_REVISION_SCON_SOCITSCP: + _pcictrl_msc = (unsigned long)ioremap(MIPS_SOCITSC_PCI_REG_BASE, 0x2000); + goto mips_pci_controller; + + default: + /* Unknown system controller */ + mips_display_message("SC Error"); + while (1); /* We die here... */ + } + board_nmi_handler_setup = mips_nmi_setup; + board_ejtag_handler_setup = mips_ejtag_setup; + + pr_info("\nLINUX started...\n"); + prom_init_cmdline(); + prom_meminit(); +#ifdef CONFIG_SERIAL_8250_CONSOLE + console_config(); +#endif +#ifdef CONFIG_MIPS_CMP + register_smp_ops(&cmp_smp_ops); +#endif +#ifdef CONFIG_MIPS_MT_SMP + register_smp_ops(&vsmp_smp_ops); +#endif +#ifdef CONFIG_MIPS_MT_SMTC + register_smp_ops(&msmtc_smp_ops); +#endif +} diff --git a/arch/mips/mti-malta/malta-int.c b/arch/mips/mti-malta/malta-int.c new file mode 100644 index 00000000000..ea176113fea --- /dev/null +++ b/arch/mips/mti-malta/malta-int.c @@ -0,0 +1,712 @@ +/* + * Carsten Langgaard, carstenl@mips.com + * Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc. + * Copyright (C) 2001 Ralf Baechle + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Routines for generic manipulation of the interrupts found on the MIPS + * Malta board. + * The interrupt controller is located in the South Bridge a PIIX4 device + * with two internal 82C95 interrupt controllers. + */ +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel_stat.h> +#include <linux/kernel.h> +#include <linux/random.h> + +#include <asm/traps.h> +#include <asm/i8259.h> +#include <asm/irq_cpu.h> +#include <asm/irq_regs.h> +#include <asm/mips-boards/malta.h> +#include <asm/mips-boards/maltaint.h> +#include <asm/mips-boards/piix4.h> +#include <asm/gt64120.h> +#include <asm/mips-boards/generic.h> +#include <asm/mips-boards/msc01_pci.h> +#include <asm/msc01_ic.h> +#include <asm/gic.h> +#include <asm/gcmpregs.h> + +int gcmp_present = -1; +int gic_present; +static unsigned long _msc01_biu_base; +static unsigned long _gcmp_base; +static unsigned int ipi_map[NR_CPUS]; + +static DEFINE_SPINLOCK(mips_irq_lock); + +static inline int mips_pcibios_iack(void) +{ + int irq; + u32 dummy; + + /* + * Determine highest priority pending interrupt by performing + * a PCI Interrupt Acknowledge cycle. + */ + switch (mips_revision_sconid) { + case MIPS_REVISION_SCON_SOCIT: + case MIPS_REVISION_SCON_ROCIT: + case MIPS_REVISION_SCON_SOCITSC: + case MIPS_REVISION_SCON_SOCITSCP: + MSC_READ(MSC01_PCI_IACK, irq); + irq &= 0xff; + break; + case MIPS_REVISION_SCON_GT64120: + irq = GT_READ(GT_PCI0_IACK_OFS); + irq &= 0xff; + break; + case MIPS_REVISION_SCON_BONITO: + /* The following will generate a PCI IACK cycle on the + * Bonito controller. It's a little bit kludgy, but it + * was the easiest way to implement it in hardware at + * the given time. + */ + BONITO_PCIMAP_CFG = 0x20000; + + /* Flush Bonito register block */ + dummy = BONITO_PCIMAP_CFG; + iob(); /* sync */ + + irq = readl((u32 *)_pcictrl_bonito_pcicfg); + iob(); /* sync */ + irq &= 0xff; + BONITO_PCIMAP_CFG = 0; + break; + default: + printk(KERN_WARNING "Unknown system controller.\n"); + return -1; + } + return irq; +} + +static inline int get_int(void) +{ + unsigned long flags; + int irq; + spin_lock_irqsave(&mips_irq_lock, flags); + + irq = mips_pcibios_iack(); + + /* + * The only way we can decide if an interrupt is spurious + * is by checking the 8259 registers. This needs a spinlock + * on an SMP system, so leave it up to the generic code... + */ + + spin_unlock_irqrestore(&mips_irq_lock, flags); + + return irq; +} + +static void malta_hw0_irqdispatch(void) +{ + int irq; + + irq = get_int(); + if (irq < 0) { + /* interrupt has already been cleared */ + return; + } + + do_IRQ(MALTA_INT_BASE + irq); +} + +static void malta_ipi_irqdispatch(void) +{ + int irq; + + irq = gic_get_int(); + if (irq < 0) + return; /* interrupt has already been cleared */ + + do_IRQ(MIPS_GIC_IRQ_BASE + irq); +} + +static void corehi_irqdispatch(void) +{ + unsigned int intedge, intsteer, pcicmd, pcibadaddr; + unsigned int pcimstat, intisr, inten, intpol; + unsigned int intrcause, datalo, datahi; + struct pt_regs *regs = get_irq_regs(); + + printk(KERN_EMERG "CoreHI interrupt, shouldn't happen, we die here!\n"); + printk(KERN_EMERG "epc : %08lx\nStatus: %08lx\n" + "Cause : %08lx\nbadVaddr : %08lx\n", + regs->cp0_epc, regs->cp0_status, + regs->cp0_cause, regs->cp0_badvaddr); + + /* Read all the registers and then print them as there is a + problem with interspersed printk's upsetting the Bonito controller. + Do it for the others too. + */ + + switch (mips_revision_sconid) { + case MIPS_REVISION_SCON_SOCIT: + case MIPS_REVISION_SCON_ROCIT: + case MIPS_REVISION_SCON_SOCITSC: + case MIPS_REVISION_SCON_SOCITSCP: + ll_msc_irq(); + break; + case MIPS_REVISION_SCON_GT64120: + intrcause = GT_READ(GT_INTRCAUSE_OFS); + datalo = GT_READ(GT_CPUERR_ADDRLO_OFS); + datahi = GT_READ(GT_CPUERR_ADDRHI_OFS); + printk(KERN_EMERG "GT_INTRCAUSE = %08x\n", intrcause); + printk(KERN_EMERG "GT_CPUERR_ADDR = %02x%08x\n", + datahi, datalo); + break; + case MIPS_REVISION_SCON_BONITO: + pcibadaddr = BONITO_PCIBADADDR; + pcimstat = BONITO_PCIMSTAT; + intisr = BONITO_INTISR; + inten = BONITO_INTEN; + intpol = BONITO_INTPOL; + intedge = BONITO_INTEDGE; + intsteer = BONITO_INTSTEER; + pcicmd = BONITO_PCICMD; + printk(KERN_EMERG "BONITO_INTISR = %08x\n", intisr); + printk(KERN_EMERG "BONITO_INTEN = %08x\n", inten); + printk(KERN_EMERG "BONITO_INTPOL = %08x\n", intpol); + printk(KERN_EMERG "BONITO_INTEDGE = %08x\n", intedge); + printk(KERN_EMERG "BONITO_INTSTEER = %08x\n", intsteer); + printk(KERN_EMERG "BONITO_PCICMD = %08x\n", pcicmd); + printk(KERN_EMERG "BONITO_PCIBADADDR = %08x\n", pcibadaddr); + printk(KERN_EMERG "BONITO_PCIMSTAT = %08x\n", pcimstat); + break; + } + + die("CoreHi interrupt", regs); +} + +static inline int clz(unsigned long x) +{ + __asm__( + " .set push \n" + " .set mips32 \n" + " clz %0, %1 \n" + " .set pop \n" + : "=r" (x) + : "r" (x)); + + return x; +} + +/* + * Version of ffs that only looks at bits 12..15. + */ +static inline unsigned int irq_ffs(unsigned int pending) +{ +#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) + return -clz(pending) + 31 - CAUSEB_IP; +#else + unsigned int a0 = 7; + unsigned int t0; + + t0 = pending & 0xf000; + t0 = t0 < 1; + t0 = t0 << 2; + a0 = a0 - t0; + pending = pending << t0; + + t0 = pending & 0xc000; + t0 = t0 < 1; + t0 = t0 << 1; + a0 = a0 - t0; + pending = pending << t0; + + t0 = pending & 0x8000; + t0 = t0 < 1; + /* t0 = t0 << 2; */ + a0 = a0 - t0; + /* pending = pending << t0; */ + + return a0; +#endif +} + +/* + * IRQs on the Malta board look basically (barring software IRQs which we + * don't use at all and all external interrupt sources are combined together + * on hardware interrupt 0 (MIPS IRQ 2)) like: + * + * MIPS IRQ Source + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 Combined hardware interrupt (hw0) + * 3 Hardware (ignored) + * 4 Hardware (ignored) + * 5 Hardware (ignored) + * 6 Hardware (ignored) + * 7 R4k timer (what we use) + * + * We handle the IRQ according to _our_ priority which is: + * + * Highest ---- R4k Timer + * Lowest ---- Combined hardware interrupt + * + * then we just return, if multiple IRQs are pending then we will just take + * another exception, big deal. + */ + +asmlinkage void plat_irq_dispatch(void) +{ + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + int irq; + + irq = irq_ffs(pending); + + if (irq == MIPSCPU_INT_I8259A) + malta_hw0_irqdispatch(); + else if (gic_present && ((1 << irq) & ipi_map[smp_processor_id()])) + malta_ipi_irqdispatch(); + else if (irq >= 0) + do_IRQ(MIPS_CPU_IRQ_BASE + irq); + else + spurious_interrupt(); +} + +#ifdef CONFIG_MIPS_MT_SMP + + +#define GIC_MIPS_CPU_IPI_RESCHED_IRQ 3 +#define GIC_MIPS_CPU_IPI_CALL_IRQ 4 + +#define MIPS_CPU_IPI_RESCHED_IRQ 0 /* SW int 0 for resched */ +#define C_RESCHED C_SW0 +#define MIPS_CPU_IPI_CALL_IRQ 1 /* SW int 1 for resched */ +#define C_CALL C_SW1 +static int cpu_ipi_resched_irq, cpu_ipi_call_irq; + +static void ipi_resched_dispatch(void) +{ + do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_RESCHED_IRQ); +} + +static void ipi_call_dispatch(void) +{ + do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ); +} + +static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id) +{ + return IRQ_HANDLED; +} + +static irqreturn_t ipi_call_interrupt(int irq, void *dev_id) +{ + smp_call_function_interrupt(); + + return IRQ_HANDLED; +} + +static struct irqaction irq_resched = { |