9 files changed, 95 insertions, 73 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5ebc5d922ea1..272eadc7a12c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -195,7 +195,8 @@ config VECTORS_BASE
           The base address of exception vectors.
 
 config ARM_PATCH_PHYS_VIRT
-        bool "Patch physical to virtual translations at runtime"
+        bool "Patch physical to virtual translations at runtime" if EMBEDDED
+        default y
         depends on !XIP_KERNEL && MMU
         depends on !ARCH_REALVIEW || !SPARSEMEM
         help
@@ -204,16 +205,12 @@ config ARM_PATCH_PHYS_VIRT
           kernel in system memory.
 
           This can only be used with non-XIP MMU kernels where the base
-          of physical memory is at a 16MB boundary, or theoretically 64K
-          for the MSM machine class.
+          of physical memory is at a 16MB boundary.
+
+          Only disable this option if you know that you do not require
+          this feature (eg, building a kernel for a single machine) and
+          you need to shrink the kernel to the minimal size.
 
-config ARM_PATCH_PHYS_VIRT_16BIT
-        def_bool y
-        depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
-        help
-          This option extends the physical to virtual translation patching
-          to allow physical memory down to a theoretical minimum of 64K
-          boundaries.
 
 source "init/Kconfig"
 
@@ -301,7 +298,6 @@ config ARCH_AT91
         select ARCH_REQUIRE_GPIOLIB
         select HAVE_CLK
         select CLKDEV_LOOKUP
-        select ARM_PATCH_PHYS_VIRT if MMU
         help
           This enables support for systems based on the Atmel AT91RM9200,
           AT91SAM9 and AT91CAP9 processors.
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 70c424eaf7b0..5665c2a3b652 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -128,6 +128,9 @@ textofs-$(CONFIG_PM_H1940)      := 0x00108000
 ifeq ($(CONFIG_ARCH_SA1100),y)
 textofs-$(CONFIG_SA1111) := 0x00208000
 endif
+textofs-$(CONFIG_ARCH_MSM7X30) := 0x00208000
+textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
+textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
 
 # Machine directory name.  This list is sorted alphanumerically
 # by CONFIG_* macro name.
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 652fccca4952..90bca427e367 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -151,7 +151,6 @@
  * so that all we need to do is modify the 8-bit constant field.
  */
 #define __PV_BITS_31_24 0x81000000
-#define __PV_BITS_23_16 0x00810000
 
 extern unsigned long __pv_phys_offset;
 #define PHYS_OFFSET __pv_phys_offset
@@ -169,9 +168,6 @@ static inline unsigned long __virt_to_phys(unsigned long x)
 {
         unsigned long t;
         __pv_stub(x, t, "add", __PV_BITS_31_24);
-#ifdef CONFIG_ARM_PATCH_PHYS_VIRT_16BIT
-        __pv_stub(t, t, "add", __PV_BITS_23_16);
-#endif
         return t;
 }
 
@@ -179,9 +175,6 @@ static inline unsigned long __phys_to_virt(unsigned long x)
 {
         unsigned long t;
         __pv_stub(x, t, "sub", __PV_BITS_31_24);
-#ifdef CONFIG_ARM_PATCH_PHYS_VIRT_16BIT
-        __pv_stub(t, t, "sub", __PV_BITS_23_16);
-#endif
         return t;
 }
 #else
diff --git a/arch/arm/include/asm/module.h b/arch/arm/include/asm/module.h
index 543b44916d2c..6c6809f982f1 100644
--- a/arch/arm/include/asm/module.h
+++ b/arch/arm/include/asm/module.h
@@ -31,11 +31,7 @@ struct mod_arch_specific {
 
 /* Add __virt_to_phys patching state as well */
 #ifdef CONFIG_ARM_PATCH_PHYS_VIRT
-#ifdef CONFIG_ARM_PATCH_PHYS_VIRT_16BIT
-#define MODULE_ARCH_VERMAGIC_P2V "p2v16 "
-#else
 #define MODULE_ARCH_VERMAGIC_P2V "p2v8 "
-#endif
 #else
 #define MODULE_ARCH_VERMAGIC_P2V ""
 #endif
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 742b6108a001..136abb610948 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -488,13 +488,8 @@ __fixup_pv_table:
         add     r5, r5, r3      @ adjust table end address
         add     r7, r7, r3      @ adjust __pv_phys_offset address
         str     r8, [r7]        @ save computed PHYS_OFFSET to __pv_phys_offset
-#ifndef CONFIG_ARM_PATCH_PHYS_VIRT_16BIT
         mov     r6, r3, lsr #24 @ constant for add/sub instructions
         teq     r3, r6, lsl #24 @ must be 16MiB aligned
-#else
-        mov     r6, r3, lsr #16 @ constant for add/sub instructions
-        teq     r3, r6, lsl #16 @ must be 64kiB aligned
-#endif
 THUMB(  it      ne              @ cross section branch )
         bne     __error
         str     r6, [r7, #4]    @ save to __pv_offset
@@ -510,20 +505,8 @@ ENDPROC(__fixup_pv_table)
         .text
 __fixup_a_pv_table:
 #ifdef CONFIG_THUMB2_KERNEL
-#ifdef CONFIG_ARM_PATCH_PHYS_VIRT_16BIT
-        lsls    r0, r6, #24
-        lsr     r6, #8
-        beq     1f
-        clz     r7, r0
-        lsr     r0, #24
-        lsl     r0, r7
-        bic     r0, 0x0080
-        lsrs    r7, #1
-        orrcs   r0, #0x0080
-        orr     r0, r0, r7, lsl #12
-#endif
-1:      lsls    r6, #24
-        beq     4f
+        lsls    r6, #24
+        beq     2f
         clz     r7, r6
         lsr     r6, #24
         lsl     r6, r7
@@ -532,43 +515,25 @@ __fixup_a_pv_table:
         orrcs   r6, #0x0080
         orr     r6, r6, r7, lsl #12
         orr     r6, #0x4000
-        b       4f
-2:      @ at this point the C flag is always clear
-        add     r7, r3
-#ifdef CONFIG_ARM_PATCH_PHYS_VIRT_16BIT
-        ldrh    ip, [r7]
-        tst     ip, 0x0400      @ the i bit tells us LS or MS byte
-        beq     3f
-        cmp     r0, #0          @ set C flag, and ...
-        biceq   ip, 0x0400      @ immediate zero value has a special encoding
-        streqh  ip, [r7]        @ that requires the i bit cleared
-#endif
-3:      ldrh    ip, [r7, #2]
+        b       2f
+1:      add     r7, r3
+        ldrh    ip, [r7, #2]
         and     ip, 0x8f00
-        orrcc   ip, r6  @ mask in offset bits 31-24
-        orrcs   ip, r0  @ mask in offset bits 23-16
+        orr     ip, r6  @ mask in offset bits 31-24
         strh    ip, [r7, #2]
-4:      cmp     r4, r5
+2:      cmp     r4, r5
         ldrcc   r7, [r4], #4    @ use branch for delay slot
-        bcc     2b
+        bcc     1b
         bx      lr
 #else
-#ifdef CONFIG_ARM_PATCH_PHYS_VIRT_16BIT
-        and     r0, r6, #255    @ offset bits 23-16
-        mov     r6, r6, lsr #8  @ offset bits 31-24
-#else
-        mov     r0, #0          @ just in case...
-#endif
-        b       3f
-2:      ldr     ip, [r7, r3]
+        b       2f
+1:      ldr     ip, [r7, r3]
         bic     ip, ip, #0x000000ff
-        tst     ip, #0x400      @ rotate shift tells us LS or MS byte
-        orrne   ip, ip, r6      @ mask in offset bits 31-24
-        orreq   ip, ip, r0      @ mask in offset bits 23-16
+        orr     ip, ip, r6      @ mask in offset bits 31-24
         str     ip, [r7, r3]
-3:      cmp     r4, r5
+2:      cmp     r4, r5
         ldrcc   r7, [r4], #4    @ use branch for delay slot
-        bcc     2b
+        bcc     1b
         mov     pc, lr
 #endif
 ENDPROC(__fixup_a_pv_table)
diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
index 5a2ab6855183..bb72ea0383b7 100644
--- a/arch/arm/mach-msm/board-msm7x30.c
+++ b/arch/arm/mach-msm/board-msm7x30.c
@@ -24,6 +24,7 @@
 #include <linux/smsc911x.h>
 #include <linux/usb/msm_hsusb.h>
 #include <linux/clkdev.h>
+#include <linux/memblock.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -42,6 +43,21 @@
 
 extern struct sys_timer msm_timer;
 
+static void __init msm7x30_fixup(struct machine_desc *desc, struct tag *tag,
+                         char **cmdline, struct meminfo *mi)
+{
+        for (; tag->hdr.size; tag = tag_next(tag))
+                if (tag->hdr.tag == ATAG_MEM && tag->u.mem.start == 0x200000) {
+                        tag->u.mem.start = 0;
+                        tag->u.mem.size += SZ_2M;
+                }
+}
+
+static void __init msm7x30_reserve(void)
+{
+        memblock_remove(0x0, SZ_2M);
+}
+
 static int hsusb_phy_init_seq[] = {
         0x30, 0x32,     /* Enable and set Pre-Emphasis Depth to 20% */
         0x02, 0x36,     /* Disable CDR Auto Reset feature */
@@ -107,6 +123,8 @@ static void __init msm7x30_map_io(void)
 
 MACHINE_START(MSM7X30_SURF, "QCT MSM7X30 SURF")
         .atag_offset = 0x100,
+        .fixup = msm7x30_fixup,
+        .reserve = msm7x30_reserve,
         .map_io = msm7x30_map_io,
         .init_irq = msm7x30_init_irq,
         .init_machine = msm7x30_init,
@@ -115,6 +133,8 @@ MACHINE_END
 
 MACHINE_START(MSM7X30_FFA, "QCT MSM7X30 FFA")
         .atag_offset = 0x100,
+        .fixup = msm7x30_fixup,
+        .reserve = msm7x30_reserve,
         .map_io = msm7x30_map_io,
         .init_irq = msm7x30_init_irq,
         .init_machine = msm7x30_init,
@@ -123,6 +143,8 @@ MACHINE_END
 
 MACHINE_START(MSM7X30_FLUID, "QCT MSM7X30 FLUID")
         .atag_offset = 0x100,
+        .fixup = msm7x30_fixup,
+        .reserve = msm7x30_reserve,
         .map_io = msm7x30_map_io,
         .init_irq = msm7x30_init_irq,
         .init_machine = msm7x30_init,
diff --git a/arch/arm/mach-msm/board-msm8960.c b/arch/arm/mach-msm/board-msm8960.c
index 35c7ceeb3f29..b04468e7d00e 100644
--- a/arch/arm/mach-msm/board-msm8960.c
+++ b/arch/arm/mach-msm/board-msm8960.c
@@ -20,16 +20,34 @@
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/clkdev.h>
+#include <linux/memblock.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/hardware/gic.h>
+#include <asm/setup.h>
 
 #include <mach/board.h>
 #include <mach/msm_iomap.h>
 
 #include "devices.h"
 
+static void __init msm8960_fixup(struct machine_desc *desc, struct tag *tag,
+                         char **cmdline, struct meminfo *mi)
+{
+        for (; tag->hdr.size; tag = tag_next(tag))
+                if (tag->hdr.tag == ATAG_MEM &&
+                                tag->u.mem.start == 0x40200000) {
+                        tag->u.mem.start = 0x40000000;
+                        tag->u.mem.size += SZ_2M;
+                }
+}
+
+static void __init msm8960_reserve(void)
+{
+        memblock_remove(0x40000000, SZ_2M);
+}
+
 static void __init msm8960_map_io(void)
 {
         msm_map_msm8960_io();
@@ -76,6 +94,8 @@ static void __init msm8960_rumi3_init(void)
 }
 
 MACHINE_START(MSM8960_SIM, "QCT MSM8960 SIMULATOR")
+        .fixup = msm8960_fixup,
+        .reserve = msm8960_reserve,
         .map_io = msm8960_map_io,
         .init_irq = msm8960_init_irq,
         .timer = &msm_timer,
@@ -83,6 +103,8 @@ MACHINE_START(MSM8960_SIM, "QCT MSM8960 SIMULATOR")
 MACHINE_END
 
 MACHINE_START(MSM8960_RUMI3, "QCT MSM8960 RUMI3")
+        .fixup = msm8960_fixup,
+        .reserve = msm8960_reserve,
         .map_io = msm8960_map_io,
         .init_irq = msm8960_init_irq,
         .timer = &msm_timer,
diff --git a/arch/arm/mach-msm/board-msm8x60.c b/arch/arm/mach-msm/board-msm8x60.c
index 1163b6fd05d2..9221f54778be 100644
--- a/arch/arm/mach-msm/board-msm8x60.c
+++ b/arch/arm/mach-msm/board-msm8x60.c
@@ -20,14 +20,31 @@
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/irq.h>
+#include <linux/memblock.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/hardware/gic.h>
+#include <asm/setup.h>
 
 #include <mach/board.h>
 #include <mach/msm_iomap.h>
 
+static void __init msm8x60_fixup(struct machine_desc *desc, struct tag *tag,
+                         char **cmdline, struct meminfo *mi)
+{
+        for (; tag->hdr.size; tag = tag_next(tag))
+                if (tag->hdr.tag == ATAG_MEM &&
+                                tag->u.mem.start == 0x40200000) {
+                        tag->u.mem.start = 0x40000000;
+                        tag->u.mem.size += SZ_2M;
+                }
+}
+
+static void __init msm8x60_reserve(void)
+{
+        memblock_remove(0x40000000, SZ_2M);
+}
 
 static void __init msm8x60_map_io(void)
 {
@@ -65,6 +82,8 @@ static void __init msm8x60_init(void)
 }
 
 MACHINE_START(MSM8X60_RUMI3, "QCT MSM8X60 RUMI3")
+        .fixup = msm8x60_fixup,
+        .reserve = msm8x60_reserve,
         .map_io = msm8x60_map_io,
         .init_irq = msm8x60_init_irq,
         .init_machine = msm8x60_init,
@@ -72,6 +91,8 @@ MACHINE_START(MSM8X60_RUMI3, "QCT MSM8X60 RUMI3")
 MACHINE_END
 
 MACHINE_START(MSM8X60_SURF, "QCT MSM8X60 SURF")
+        .fixup = msm8x60_fixup,
+        .reserve = msm8x60_reserve,
         .map_io = msm8x60_map_io,
         .init_irq = msm8x60_init_irq,
         .init_machine = msm8x60_init,
@@ -79,6 +100,8 @@ MACHINE_START(MSM8X60_SURF, "QCT MSM8X60 SURF")
 MACHINE_END
 
 MACHINE_START(MSM8X60_SIM, "QCT MSM8X60 SIMULATOR")
+        .fixup = msm8x60_fixup,
+        .reserve = msm8x60_reserve,
         .map_io = msm8x60_map_io,
         .init_irq = msm8x60_init_irq,
         .init_machine = msm8x60_init,
@@ -86,6 +109,8 @@ MACHINE_START(MSM8X60_SIM, "QCT MSM8X60 SIMULATOR")
 MACHINE_END
 
 MACHINE_START(MSM8X60_FFA, "QCT MSM8X60 FFA")
+        .fixup = msm8x60_fixup,
+        .reserve = msm8x60_reserve,
         .map_io = msm8x60_map_io,
         .init_irq = msm8x60_init_irq,
         .init_machine = msm8x60_init,
diff --git a/arch/arm/mach-msm/include/mach/memory.h b/arch/arm/mach-msm/include/mach/memory.h
index f2f8d299ba95..58d5e7eec431 100644
--- a/arch/arm/mach-msm/include/mach/memory.h
+++ b/arch/arm/mach-msm/include/mach/memory.h
@@ -22,11 +22,11 @@
 #elif defined(CONFIG_ARCH_QSD8X50)
 #define PLAT_PHYS_OFFSET                UL(0x20000000)
 #elif defined(CONFIG_ARCH_MSM7X30)
-#define PLAT_PHYS_OFFSET                UL(0x00200000)
+#define PLAT_PHYS_OFFSET                UL(0x00000000)
 #elif defined(CONFIG_ARCH_MSM8X60)
-#define PLAT_PHYS_OFFSET                UL(0x40200000)
+#define PLAT_PHYS_OFFSET                UL(0x40000000)
 #elif defined(CONFIG_ARCH_MSM8960)
-#define PLAT_PHYS_OFFSET                UL(0x40200000)
+#define PLAT_PHYS_OFFSET                UL(0x40000000)
 #else
 #define PLAT_PHYS_OFFSET                UL(0x10000000)
 #endif