6 files changed, 70 insertions, 86 deletions

diff --git a/arch/mips/mips-boards/sim/cmdline.c b/arch/mips/mips-boards/sim/cmdline.c
deleted file mode 100644
index fef9fbd8e710..000000000000
--- a/arch/mips/mips-boards/sim/cmdline.c
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * 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 *)(((int *)(int)_prom_argv)[(index)]))
-
-char arcs_cmdline[CL_SIZE];
-
-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/mips-boards/sim/sim_cmdline.c b/arch/mips/mips-boards/sim/sim_cmdline.c
index 9df37c6fca36..c63021a5dc6c 100644
--- a/arch/mips/mips-boards/sim/sim_cmdline.c
+++ b/arch/mips/mips-boards/sim/sim_cmdline.c
@@ -26,8 +26,10 @@ char * __init prom_getcmdline(void)
         return arcs_cmdline;
 }
 
-
 void  __init prom_init_cmdline(void)
 {
-    /* nothing to do */
+        char *cp;
+        cp = arcs_cmdline;
+        /* Get boot line from environment? */
+        *cp = '\0';
 }
diff --git a/arch/mips/mips-boards/sim/sim_int.c b/arch/mips/mips-boards/sim/sim_int.c
index a4d0a2c05031..2c15c8efec4e 100644
--- a/arch/mips/mips-boards/sim/sim_int.c
+++ b/arch/mips/mips-boards/sim/sim_int.c
@@ -25,17 +25,71 @@
 
 extern void mips_cpu_irq_init(int);
 
-extern asmlinkage void simIRQ(void);
+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 = s0 & 0xf000;
+        t0 = t0 < 1;
+        t0 = t0 << 2;
+        a0 = a0 - t0;
+        s0 = s0 << t0;
+
+        t0 = s0 & 0xc000;
+        t0 = t0 < 1;
+        t0 = t0 << 1;
+        a0 = a0 - t0;
+        s0 = s0 << t0;
 
-asmlinkage void sim_hw0_irqdispatch(struct pt_regs *regs)
+        t0 = s0 & 0x8000;
+        t0 = t0 < 1;
+        //t0 = t0 << 2;
+        a0 = a0 - t0;
+        //s0 = s0 << t0;
+
+        return a0;
+#endif
+}
+
+static inline void sim_hw0_irqdispatch(struct pt_regs *regs)
 {
         do_IRQ(2, regs);
 }
 
-void __init arch_init_irq(void)
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
 {
-        /* Now safe to set the exception vector. */
-        set_except_vector(0, simIRQ);
+        unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+        int irq;
+
+        irq = irq_ffs(pending);
 
+        if (irq > 0)
+                do_IRQ(MIPSCPU_INT_BASE + irq, regs);
+        else
+                spurious_interrupt(regs);
+}
+
+void __init arch_init_irq(void)
+{
         mips_cpu_irq_init(MIPSCPU_INT_BASE);
 }
diff --git a/arch/mips/mips-boards/sim/sim_irq.S b/arch/mips/mips-boards/sim/sim_irq.S
index da52297a2216..d16cf3822076 100644
--- a/arch/mips/mips-boards/sim/sim_irq.S
+++ b/arch/mips/mips-boards/sim/sim_irq.S
@@ -94,6 +94,8 @@
 
 
 spurious:
-        j       spurious_interrupt
+        jal     spurious_interrupt
+         nop
+        j       ret_from_irq
          nop
         END(simIRQ)
diff --git a/arch/mips/mips-boards/sim/sim_mem.c b/arch/mips/mips-boards/sim/sim_mem.c
index e57f737bab10..f7ce76983328 100644
--- a/arch/mips/mips-boards/sim/sim_mem.c
+++ b/arch/mips/mips-boards/sim/sim_mem.c
@@ -18,9 +18,11 @@
 #include <linux/init.h>
 #include <linux/mm.h>
 #include <linux/bootmem.h>
+#include <linux/pfn.h>
 
 #include <asm/bootinfo.h>
 #include <asm/page.h>
+#include <asm/sections.h>
 
 #include <asm/mips-boards/prom.h>
 
@@ -39,9 +41,6 @@ static char *mtypes[3] = {
 };
 #endif
 
-/* References to section boundaries */
-extern char _end;
-
 struct prom_pmemblock * __init prom_getmdesc(void)
 {
         unsigned int memsize;
@@ -61,10 +60,10 @@ struct prom_pmemblock * __init prom_getmdesc(void)
 
         mdesc[2].type = simmem_reserved;
         mdesc[2].base = 0x00100000;
-        mdesc[2].size = CPHYSADDR(PAGE_ALIGN(&_end)) - mdesc[2].base;
+        mdesc[2].size = CPHYSADDR(PFN_ALIGN(&_end)) - mdesc[2].base;
 
         mdesc[3].type = simmem_free;
-        mdesc[3].base = CPHYSADDR(PAGE_ALIGN(&_end));
+        mdesc[3].base = CPHYSADDR(PFN_ALIGN(&_end));
         mdesc[3].size = memsize - mdesc[3].base;
 
         return &mdesc[0];
diff --git a/arch/mips/mips-boards/sim/sim_smp.c b/arch/mips/mips-boards/sim/sim_smp.c
index a9f0c2bfe4ad..b7084e7c4bf9 100644
--- a/arch/mips/mips-boards/sim/sim_smp.c
+++ b/arch/mips/mips-boards/sim/sim_smp.c
@@ -44,8 +44,6 @@
 void core_send_ipi(int cpu, unsigned int action)
 {
 #ifdef CONFIG_MIPS_MT_SMTC
-        void smtc_send_ipi(int, int, unsigned int);
-
         smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
 #endif /* CONFIG_MIPS_MT_SMTC */
 /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
@@ -59,15 +57,8 @@ void core_send_ipi(int cpu, unsigned int action)
 void __init prom_build_cpu_map(void)
 {
 #ifdef CONFIG_MIPS_MT_SMTC
-        extern int mipsmt_build_cpu_map(int startslot);
         int nextslot;
 
-        cpus_clear(phys_cpu_present_map);
-
-        /* Register the boot CPU */
-
-        smp_prepare_boot_cpu();
-
         /*
          * As of November, 2004, MIPSsim only simulates one core
          * at a time.  However, that core may be a MIPS MT core
@@ -87,8 +78,6 @@ void __init prom_build_cpu_map(void)
 void prom_boot_secondary(int cpu, struct task_struct *idle)
 {
 #ifdef CONFIG_MIPS_MT_SMTC
-        extern void smtc_boot_secondary(int cpu, struct task_struct *t);
-
         smtc_boot_secondary(cpu, idle);
 #endif /* CONFIG_MIPS_MT_SMTC */
 }
@@ -113,7 +102,6 @@ void prom_init_secondary(void)
 void prom_prepare_cpus(unsigned int max_cpus)
 {
 #ifdef CONFIG_MIPS_MT_SMTC
-        void mipsmt_prepare_cpus(int c);
         /*
          * As noted above, we can assume a single CPU for now
          * but it may be multithreaded.
@@ -132,8 +120,6 @@ void prom_prepare_cpus(unsigned int max_cpus)
 void prom_smp_finish(void)
 {
 #ifdef CONFIG_MIPS_MT_SMTC
-        void smtc_smp_finish(void);
-
         smtc_smp_finish();
 #endif /* CONFIG_MIPS_MT_SMTC */
 }