9 files changed, 202 insertions, 309 deletions

diff --git a/arch/mips/mti-malta/Makefile b/arch/mips/mti-malta/Makefile
index 6079ef33b5f0..0388fc8b5613 100644
--- a/arch/mips/mti-malta/Makefile
+++ b/arch/mips/mti-malta/Makefile
@@ -5,9 +5,8 @@
 # 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-platform.o \
+obj-y                           := malta-amon.o malta-display.o malta-init.o \
+                                   malta-int.o malta-memory.o malta-platform.o \
                                    malta-reset.o malta-setup.o malta-time.o
 
 obj-$(CONFIG_EARLY_PRINTK)      += malta-console.o
diff --git a/arch/mips/mti-malta/Platform b/arch/mips/mti-malta/Platform
index 5b548b5a4fcf..2cc72c9b38e3 100644
--- a/arch/mips/mti-malta/Platform
+++ b/arch/mips/mti-malta/Platform
@@ -3,5 +3,9 @@
 #
 platform-$(CONFIG_MIPS_MALTA)   += mti-malta/
 cflags-$(CONFIG_MIPS_MALTA)     += -I$(srctree)/arch/mips/include/asm/mach-malta
-load-$(CONFIG_MIPS_MALTA)       += 0xffffffff80100000
+ifdef CONFIG_KVM_GUEST
+    load-$(CONFIG_MIPS_MALTA)   += 0x0000000040100000
+else
+    load-$(CONFIG_MIPS_MALTA)   += 0xffffffff80100000
+endif
 all-$(CONFIG_MIPS_MALTA)        := $(COMPRESSION_FNAME).bin
diff --git a/arch/mips/mti-malta/malta-cmdline.c b/arch/mips/mti-malta/malta-cmdline.c
deleted file mode 100644
index 5576a306a145..000000000000
--- a/arch/mips/mti-malta/malta-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 *)(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-display.c b/arch/mips/mti-malta/malta-display.c
index 9bc58a24e80a..d4f807191ecd 100644
--- a/arch/mips/mti-malta/malta-display.c
+++ b/arch/mips/mti-malta/malta-display.c
@@ -1,28 +1,20 @@
 /*
- * 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.
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
  *
  * Display routines for display messages in MIPS boards ascii display.
+ *
+ * Copyright (C) 1999,2000,2012  MIPS Technologies, Inc.
+ * All rights reserved.
+ * Authors: Carsten Langgaard <carstenl@mips.com>
+ *          Steven J. Hill <sjhill@mips.com>
  */
-
 #include <linux/compiler.h>
 #include <linux/timer.h>
-#include <asm/io.h>
+#include <linux/io.h>
+
 #include <asm/mips-boards/generic.h>
-#include <asm/mips-boards/prom.h>
 
 extern const char display_string[];
 static unsigned int display_count;
@@ -36,11 +28,11 @@ void mips_display_message(const char *str)
         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);
+        for (i = 0; i <= 14; i += 2) {
+                if (*str)
+                        __raw_writel(*str++, display + i);
+                else
+                        __raw_writel(' ', display + i);
         }
 }
 
diff --git a/arch/mips/mti-malta/malta-init.c b/arch/mips/mti-malta/malta-init.c
index c2cbce9e435e..ff8caffd3266 100644
--- a/arch/mips/mti-malta/malta-init.c
+++ b/arch/mips/mti-malta/malta-init.c
@@ -1,54 +1,28 @@
 /*
- * 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.
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
  *
  * PROM library initialisation code.
+ *
+ * Copyright (C) 1999,2000,2004,2005,2012  MIPS Technologies, Inc.
+ * All rights reserved.
+ * Authors: Carsten Langgaard <carstenl@mips.com>
+ *         Maciej W. Rozycki <macro@mips.com>
+ *          Steven J. Hill <sjhill@mips.com>
  */
 #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/cacheflush.h>
 #include <asm/smp-ops.h>
 #include <asm/traps.h>
-
+#include <asm/fw/fw.h>
 #include <asm/gcmpregs.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>
 
-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;
-
 static int mips_revision_corid;
 int mips_revision_sconid;
 
@@ -62,74 +36,6 @@ 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)
 {
@@ -138,17 +44,23 @@ static void __init console_config(void)
         char parity = '\0', bits = '\0', flow = '\0';
         char *s;
 
-        if ((strstr(prom_getcmdline(), "console=")) == NULL) {
-                s = prom_getenv("modetty0");
+        if ((strstr(fw_getcmdline(), "console=")) == NULL) {
+                s = fw_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 (*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;
@@ -158,8 +70,9 @@ static void __init console_config(void)
                         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);
+                sprintf(console_string, " console=ttyS0,%d%c%c%c", baud,
+                        parity, bits, flow);
+                strcat(fw_getcmdline(), console_string);
                 pr_info("Config serial console:%s\n", console_string);
         }
 }
@@ -193,10 +106,6 @@ 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");
 
         /*
@@ -306,7 +215,7 @@ void __init prom_init(void)
         case MIPS_REVISION_SCON_SOCIT:
         case MIPS_REVISION_SCON_ROCIT:
                 _pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000);
-        mips_pci_controller:
+mips_pci_controller:
                 mb();
                 MSC_READ(MSC01_PCI_CFG, data);
                 MSC_WRITE(MSC01_PCI_CFG, data & ~MSC01_PCI_CFG_EN_BIT);
@@ -348,13 +257,13 @@ void __init prom_init(void)
         default:
                 /* Unknown system controller */
                 mips_display_message("SC Error");
-                while (1);   /* We die here... */
+                while (1);      /* We die here... */
         }
         board_nmi_handler_setup = mips_nmi_setup;
         board_ejtag_handler_setup = mips_ejtag_setup;
 
-        prom_init_cmdline();
-        prom_meminit();
+        fw_init_cmdline();
+        fw_meminit();
 #ifdef CONFIG_SERIAL_8250_CONSOLE
         console_config();
 #endif
diff --git a/arch/mips/mti-malta/malta-int.c b/arch/mips/mti-malta/malta-int.c
index e364af70e6cf..0a1339ac3ec8 100644
--- a/arch/mips/mti-malta/malta-int.c
+++ b/arch/mips/mti-malta/malta-int.c
@@ -47,7 +47,6 @@
 #include <asm/setup.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];
@@ -134,6 +133,9 @@ static void malta_ipi_irqdispatch(void)
 {
         int irq;
 
+        if (gic_compare_int())
+                do_IRQ(MIPS_GIC_IRQ_BASE);
+
         irq = gic_get_int();
         if (irq < 0)
                 return;  /* interrupt has already been cleared */
diff --git a/arch/mips/mti-malta/malta-memory.c b/arch/mips/mti-malta/malta-memory.c
index f3d43aa023a9..1f73d63e92a7 100644
--- a/arch/mips/mti-malta/malta-memory.c
+++ b/arch/mips/mti-malta/malta-memory.c
@@ -1,73 +1,45 @@
 /*
- * 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.
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
  *
  * PROM library functions for acquiring/using memory descriptors given to
  * us from the YAMON.
+ *
+ * Copyright (C) 1999,2000,2012  MIPS Technologies, Inc.
+ * All rights reserved.
+ * Authors: Carsten Langgaard <carstenl@mips.com>
+ *          Steven J. Hill <sjhill@mips.com>
  */
 #include <linux/init.h>
-#include <linux/mm.h>
 #include <linux/bootmem.h>
-#include <linux/pfn.h>
 #include <linux/string.h>
 
 #include <asm/bootinfo.h>
-#include <asm/page.h>
 #include <asm/sections.h>
+#include <asm/fw/fw.h>
 
-#include <asm/mips-boards/prom.h>
-
-/*#define DEBUG*/
-
-enum yamon_memtypes {
-        yamon_dontuse,
-        yamon_prom,
-        yamon_free,
-};
-static struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
-
-#ifdef DEBUG
-static char *mtypes[3] = {
-        "Dont use memory",
-        "YAMON PROM memory",
-        "Free memory",
-};
-#endif
+static fw_memblock_t mdesc[FW_MAX_MEMBLOCKS];
 
 /* determined physical memory size, not overridden by command line args  */
 unsigned long physical_memsize = 0L;
 
-static struct prom_pmemblock * __init prom_getmdesc(void)
+fw_memblock_t * __init fw_getmdesc(void)
 {
-        char *memsize_str;
+        char *memsize_str, *ptr;
         unsigned int memsize;
-        char *ptr;
         static char cmdline[COMMAND_LINE_SIZE] __initdata;
+        long val;
+        int tmp;
 
         /* otherwise look in the environment */
-        memsize_str = prom_getenv("memsize");
+        memsize_str = fw_getenv("memsize");
         if (!memsize_str) {
-                printk(KERN_WARNING
-                       "memsize not set in boot prom, set to default (32Mb)\n");
+                pr_warn("memsize not set in YAMON, set to default (32Mb)\n");
                 physical_memsize = 0x02000000;
         } else {
-#ifdef DEBUG
-                pr_debug("prom_memsize = %s\n", memsize_str);
-#endif
-                physical_memsize = simple_strtol(memsize_str, NULL, 0);
+                tmp = kstrtol(memsize_str, 0, &val);
+                physical_memsize = (unsigned long)val;
         }
 
 #ifdef CONFIG_CPU_BIG_ENDIAN
@@ -90,11 +62,11 @@ static struct prom_pmemblock * __init prom_getmdesc(void)
 
         memset(mdesc, 0, sizeof(mdesc));
 
-        mdesc[0].type = yamon_dontuse;
+        mdesc[0].type = fw_dontuse;
         mdesc[0].base = 0x00000000;
         mdesc[0].size = 0x00001000;
 
-        mdesc[1].type = yamon_prom;
+        mdesc[1].type = fw_code;
         mdesc[1].base = 0x00001000;
         mdesc[1].size = 0x000ef000;
 
@@ -105,55 +77,45 @@ static struct prom_pmemblock * __init prom_getmdesc(void)
          * This mean that this area can't be used as DMA memory for PCI
          * devices.
          */
-        mdesc[2].type = yamon_dontuse;
+        mdesc[2].type = fw_dontuse;
         mdesc[2].base = 0x000f0000;
         mdesc[2].size = 0x00010000;
 
-        mdesc[3].type = yamon_dontuse;
+        mdesc[3].type = fw_dontuse;
         mdesc[3].base = 0x00100000;
-        mdesc[3].size = CPHYSADDR(PFN_ALIGN((unsigned long)&_end)) - mdesc[3].base;
+        mdesc[3].size = CPHYSADDR(PFN_ALIGN((unsigned long)&_end)) -
+                mdesc[3].base;
 
-        mdesc[4].type = yamon_free;
+        mdesc[4].type = fw_free;
         mdesc[4].base = CPHYSADDR(PFN_ALIGN(&_end));
         mdesc[4].size = memsize - mdesc[4].base;
 
         return &mdesc[0];
 }
 
-static int __init prom_memtype_classify(unsigned int type)
+static int __init fw_memtype_classify(unsigned int type)
 {
         switch (type) {
-        case yamon_free:
+        case fw_free:
                 return BOOT_MEM_RAM;
-        case yamon_prom:
+        case fw_code:
                 return BOOT_MEM_ROM_DATA;
         default:
                 return BOOT_MEM_RESERVED;
         }
 }
 
-void __init prom_meminit(void)
+void __init fw_meminit(void)
 {
-        struct prom_pmemblock *p;
+        fw_memblock_t *p;
 
-#ifdef DEBUG
-        pr_debug("YAMON MEMORY DESCRIPTOR dump:\n");
-        p = prom_getmdesc();
-        while (p->size) {
-                int i = 0;
-                pr_debug("[%d,%p]: base<%08lx> size<%08lx> type<%s>\n",
-                         i, p, p->base, p->size, mtypes[p->type]);
-                p++;
-                i++;
-        }
-#endif
-        p = prom_getmdesc();
+        p = fw_getmdesc();
 
         while (p->size) {
                 long type;
                 unsigned long base, size;
 
-                type = prom_memtype_classify(p->type);
+                type = fw_memtype_classify(p->type);
                 base = p->base;
                 size = p->size;
 
@@ -172,7 +134,7 @@ void __init prom_free_prom_memory(void)
                         continue;
 
                 addr = boot_mem_map.map[i].addr;
-                free_init_pages("prom memory",
+                free_init_pages("YAMON memory",
                                 addr, addr + boot_mem_map.map[i].size);
         }
 }
diff --git a/arch/mips/mti-malta/malta-setup.c b/arch/mips/mti-malta/malta-setup.c
index 200f64df2c9b..c72a06936781 100644
--- a/arch/mips/mti-malta/malta-setup.c
+++ b/arch/mips/mti-malta/malta-setup.c
@@ -25,13 +25,13 @@
 #include <linux/screen_info.h>
 #include <linux/time.h>
 
-#include <asm/bootinfo.h>
+#include <asm/fw/fw.h>
 #include <asm/mips-boards/generic.h>
-#include <asm/mips-boards/prom.h>
 #include <asm/mips-boards/malta.h>
 #include <asm/mips-boards/maltaint.h>
 #include <asm/dma.h>
 #include <asm/traps.h>
+#include <asm/gcmpregs.h>
 #ifdef CONFIG_VT
 #include <linux/console.h>
 #endif
@@ -105,6 +105,66 @@ static void __init fd_activate(void)
 }
 #endif
 
+static int __init plat_enable_iocoherency(void)
+{
+        int supported = 0;
+        if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO) {
+                if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
+                        BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
+                        pr_info("Enabled Bonito CPU coherency\n");
+                        supported = 1;
+                }
+                if (strstr(fw_getcmdline(), "iobcuncached")) {
+                        BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
+                        BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
+                                ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
+                                  BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
+                        pr_info("Disabled Bonito IOBC coherency\n");
+                } else {
+                        BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
+                        BONITO_PCIMEMBASECFG |=
+                                (BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
+                                 BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
+                        pr_info("Enabled Bonito IOBC coherency\n");
+                }
+        } else if (gcmp_niocu() != 0) {
+                /* Nothing special needs to be done to enable coherency */
+                pr_info("CMP IOCU detected\n");
+                if ((*(unsigned int *)0xbf403000 & 0x81) != 0x81) {
+                        pr_crit("IOCU OPERATION DISABLED BY SWITCH - DEFAULTING TO SW IO COHERENCY\n");
+                        return 0;
+                }
+                supported = 1;
+        }
+        hw_coherentio = supported;
+        return supported;
+}
+
+static void __init plat_setup_iocoherency(void)
+{
+#ifdef CONFIG_DMA_NONCOHERENT
+        /*
+         * Kernel has been configured with software coherency
+         * but we might choose to turn it off and use hardware
+         * coherency instead.
+         */
+        if (plat_enable_iocoherency()) {
+                if (coherentio == 0)
+                        pr_info("Hardware DMA cache coherency disabled\n");
+                else
+                        pr_info("Hardware DMA cache coherency enabled\n");
+        } else {
+                if (coherentio == 1)
+                        pr_info("Hardware DMA cache coherency unsupported, but enabled from command line!\n");
+                else
+                        pr_info("Software DMA cache coherency enabled\n");
+        }
+#else
+        if (!plat_enable_iocoherency())
+                panic("Hardware DMA cache coherency not supported!");
+#endif
+}
+
 #ifdef CONFIG_BLK_DEV_IDE
 static void __init pci_clock_check(void)
 {
@@ -115,16 +175,15 @@ static void __init pci_clock_check(void)
                 33, 20, 25, 30, 12, 16, 37, 10
         };
         int pciclock = pciclocks[jmpr];
-        char *argptr = prom_getcmdline();
+        char *argptr = fw_getcmdline();
 
         if (pciclock != 33 && !strstr(argptr, "idebus=")) {
-                printk(KERN_WARNING "WARNING: PCI clock is %dMHz, "
-                                "setting idebus\n", pciclock);
+                pr_warn("WARNING: PCI clock is %dMHz, setting idebus\n",
+                        pciclock);
                 argptr += strlen(argptr);
                 sprintf(argptr, " idebus=%d", pciclock);
                 if (pciclock < 20 || pciclock > 66)
-                        printk(KERN_WARNING "WARNING: IDE timing "
-                                        "calculations will be incorrect\n");
+                        pr_warn("WARNING: IDE timing calculations will be incorrect\n");
         }
 }
 #endif
@@ -153,31 +212,31 @@ static void __init bonito_quirks_setup(void)
 {
         char *argptr;
 
-        argptr = prom_getcmdline();
+        argptr = fw_getcmdline();
         if (strstr(argptr, "debug")) {
                 BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE;
-                printk(KERN_INFO "Enabled Bonito debug mode\n");
+                pr_info("Enabled Bonito debug mode\n");
         } else
                 BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE;
 
 #ifdef CONFIG_DMA_COHERENT
         if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
                 BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
-                printk(KERN_INFO "Enabled Bonito CPU coherency\n");
+                pr_info("Enabled Bonito CPU coherency\n");
 
-                argptr = prom_getcmdline();
+                argptr = fw_getcmdline();
                 if (strstr(argptr, "iobcuncached")) {
                         BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
                         BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
                                 ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
                                         BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
-                        printk(KERN_INFO "Disabled Bonito IOBC coherency\n");
+                        pr_info("Disabled Bonito IOBC coherency\n");
                 } else {
                         BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
                         BONITO_PCIMEMBASECFG |=
                                 (BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
                                         BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
-                        printk(KERN_INFO "Enabled Bonito IOBC coherency\n");
+                        pr_info("Enabled Bonito IOBC coherency\n");
                 }
         } else
                 panic("Hardware DMA cache coherency not supported");
@@ -207,6 +266,8 @@ void __init plat_mem_setup(void)
         if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO)
                 bonito_quirks_setup();
 
+        plat_setup_iocoherency();
+
 #ifdef CONFIG_BLK_DEV_IDE
         pci_clock_check();
 #endif
diff --git a/arch/mips/mti-malta/malta-time.c b/arch/mips/mti-malta/malta-time.c
index a144b89cf9ba..0ad305f75802 100644
--- a/arch/mips/mti-malta/malta-time.c
+++ b/arch/mips/mti-malta/malta-time.c
@@ -39,12 +39,9 @@
 #include <asm/gic.h>
 
 #include <asm/mips-boards/generic.h>
-#include <asm/mips-boards/prom.h>
-
 #include <asm/mips-boards/maltaint.h>
 
 unsigned long cpu_khz;
-int gic_frequency;
 
 static int mips_cpu_timer_irq;
 static int mips_cpu_perf_irq;
@@ -74,7 +71,24 @@ static void __init estimate_frequencies(void)
 {
         unsigned long flags;
         unsigned int count, start;
+#ifdef CONFIG_IRQ_GIC
         unsigned int giccount = 0, gicstart = 0;
+#endif
+
+#if defined (CONFIG_KVM_GUEST) && defined (CONFIG_KVM_HOST_FREQ)
+        unsigned int prid = read_c0_prid() & 0xffff00;
+
+        /*
+         * XXXKYMA: hardwire the CPU frequency to Host Freq/4
+         */
+        count = (CONFIG_KVM_HOST_FREQ * 1000000) >> 3;
+        if ((prid != (PRID_COMP_MIPS | PRID_IMP_20KC)) &&
+            (prid != (PRID_COMP_MIPS | PRID_IMP_25KF)))
+                count *= 2;
+
+        mips_hpt_frequency = count;
+        return;
+#endif
 
         local_irq_save(flags);
 
@@ -84,26 +98,32 @@ static void __init estimate_frequencies(void)
 
         /* Initialize counters. */
         start = read_c0_count();
+#ifdef CONFIG_IRQ_GIC
         if (gic_present)
                 GICREAD(GIC_REG(SHARED, GIC_SH_COUNTER_31_00), gicstart);
+#endif
 
         /* Read counter exactly on falling edge of update flag. */
         while (CMOS_READ(RTC_REG_A) & RTC_UIP);
         while (!(CMOS_READ(RTC_REG_A) & RTC_UIP));
 
         count = read_c0_count();
+#ifdef CONFIG_IRQ_GIC
         if (gic_present)
                 GICREAD(GIC_REG(SHARED, GIC_SH_COUNTER_31_00), giccount);
+#endif
 
         local_irq_restore(flags);
 
         count -= start;
-        if (gic_present)
-                giccount -= gicstart;
-
         mips_hpt_frequency = count;
-        if (gic_present)
+
+#ifdef CONFIG_IRQ_GIC
+        if (gic_present) {
+                giccount -= gicstart;
                 gic_frequency = giccount;
+        }
+#endif
 }
 
 void read_persistent_clock(struct timespec *ts)
@@ -159,24 +179,27 @@ void __init plat_time_init(void)
             (prid != (PRID_COMP_MIPS | PRID_IMP_25KF)))
                 freq *= 2;
         freq = freqround(freq, 5000);
-        pr_debug("CPU frequency %d.%02d MHz\n", freq/1000000,
+        printk("CPU frequency %d.%02d MHz\n", freq/1000000,
                (freq%1000000)*100/1000000);
         cpu_khz = freq / 1000;
 
-        if (gic_present) {
-                freq = freqround(gic_frequency, 5000);
-                pr_debug("GIC frequency %d.%02d MHz\n", freq/1000000,
-                       (freq%1000000)*100/1000000);
-                gic_clocksource_init(gic_frequency);
-        } else
-                init_r4k_clocksource();
+        mips_scroll_message();
 
 #ifdef CONFIG_I8253
         /* Only Malta has a PIT. */
         setup_pit_timer();
 #endif
 
-        mips_scroll_message();
+#ifdef CONFIG_IRQ_GIC
+        if (gic_present) {
+                freq = freqround(gic_frequency, 5000);
+                printk("GIC frequency %d.%02d MHz\n", freq/1000000,
+                       (freq%1000000)*100/1000000);
+#ifdef CONFIG_CSRC_GIC
+                gic_clocksource_init(gic_frequency);
+#endif
+        }
+#endif
 
         plat_perf_setup();
 }