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authorRussell King <rmk+kernel@arm.linux.org.uk>2009-12-13 19:39:35 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-12-13 19:39:35 +0000
commitfc7736688b046f91170591625b38f12a839ba994 (patch)
treee7198a9fabfcea785cbb16375455dbdb6aa9871b /arch/arm
parentbc7ecbcbc2c0ff235382077b55de7896775afc16 (diff)
parent9074e144c10cba5d6bb6b326a8be5347d38e4473 (diff)
Merge branch 'master' into devel
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/Kconfig5
-rw-r--r--arch/arm/mach-clps711x/include/mach/memory.h2
-rw-r--r--arch/arm/mach-footbridge/common.c22
-rw-r--r--arch/arm/mach-footbridge/include/mach/memory.h15
-rw-r--r--arch/arm/mach-integrator/include/mach/memory.h3
-rw-r--r--arch/arm/mach-ixp2000/include/mach/memory.h12
-rw-r--r--arch/arm/mach-ixp23xx/include/mach/memory.h19
-rw-r--r--arch/arm/mach-lh7a40x/clocks.c8
-rw-r--r--arch/arm/mach-s3c24a0/include/mach/memory.h2
-rw-r--r--arch/arm/mach-sa1100/Kconfig13
-rw-r--r--arch/arm/mach-sa1100/generic.c12
-rw-r--r--arch/arm/vfp/vfpmodule.c83
12 files changed, 127 insertions, 69 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cf8a99f19dc..233a222752c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -603,6 +603,7 @@ config ARCH_SA1100
select ARCH_SPARSEMEM_ENABLE
select ARCH_MTD_XIP
select ARCH_HAS_CPUFREQ
+ select CPU_FREQ
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
@@ -1359,13 +1360,9 @@ source "drivers/cpufreq/Kconfig"
config CPU_FREQ_SA1100
bool
- depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
- default y
config CPU_FREQ_SA1110
bool
- depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
- default y
config CPU_FREQ_INTEGRATOR
tristate "CPUfreq driver for ARM Integrator CPUs"
diff --git a/arch/arm/mach-clps711x/include/mach/memory.h b/arch/arm/mach-clps711x/include/mach/memory.h
index e522b20bcbc..f70d52be48a 100644
--- a/arch/arm/mach-clps711x/include/mach/memory.h
+++ b/arch/arm/mach-clps711x/include/mach/memory.h
@@ -30,6 +30,8 @@
#define __virt_to_bus(x) ((x) - PAGE_OFFSET)
#define __bus_to_virt(x) ((x) + PAGE_OFFSET)
+#define __pfn_to_bus(x) (__pfn_to_phys(x) - PHYS_OFFSET)
+#define __bus_to_pfn(x) __phys_to_pfn((x) + PHYS_OFFSET)
#endif
diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c
index b97f529e58e..41febc796b1 100644
--- a/arch/arm/mach-footbridge/common.c
+++ b/arch/arm/mach-footbridge/common.c
@@ -201,6 +201,11 @@ void __init footbridge_map_io(void)
#ifdef CONFIG_FOOTBRIDGE_ADDIN
+static inline unsigned long fb_bus_sdram_offset(void)
+{
+ return *CSR_PCISDRAMBASE & 0xfffffff0;
+}
+
/*
* These two functions convert virtual addresses to PCI addresses and PCI
* addresses to virtual addresses. Note that it is only legal to use these
@@ -210,14 +215,13 @@ unsigned long __virt_to_bus(unsigned long res)
{
WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
- return (res - PAGE_OFFSET) + (*CSR_PCISDRAMBASE & 0xfffffff0);
+ return res + (fb_bus_sdram_offset() - PAGE_OFFSET);
}
EXPORT_SYMBOL(__virt_to_bus);
unsigned long __bus_to_virt(unsigned long res)
{
- res -= (*CSR_PCISDRAMBASE & 0xfffffff0);
- res += PAGE_OFFSET;
+ res = res - (fb_bus_sdram_offset() - PAGE_OFFSET);
WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
@@ -225,4 +229,16 @@ unsigned long __bus_to_virt(unsigned long res)
}
EXPORT_SYMBOL(__bus_to_virt);
+unsigned long __pfn_to_bus(unsigned long pfn)
+{
+ return __pfn_to_phys(pfn) + (fb_bus_sdram_offset() - PHYS_OFFSET));
+}
+EXPORT_SYMBOL(__pfn_to_bus);
+
+unsigned long __bus_to_pfn(unsigned long bus)
+{
+ return __phys_to_pfn(bus - (fb_bus_sdram_offset() - PHYS_OFFSET));
+}
+EXPORT_SYMBOL(__bus_to_pfn);
+
#endif
diff --git a/arch/arm/mach-footbridge/include/mach/memory.h b/arch/arm/mach-footbridge/include/mach/memory.h
index cb16e59d87b..8d64f457408 100644
--- a/arch/arm/mach-footbridge/include/mach/memory.h
+++ b/arch/arm/mach-footbridge/include/mach/memory.h
@@ -29,6 +29,8 @@
#ifndef __ASSEMBLY__
extern unsigned long __virt_to_bus(unsigned long);
extern unsigned long __bus_to_virt(unsigned long);
+extern unsigned long __pfn_to_bus(unsigned long);
+extern unsigned long __bus_to_pfn(unsigned long);
#endif
#define __virt_to_bus __virt_to_bus
#define __bus_to_virt __bus_to_virt
@@ -36,14 +38,15 @@ extern unsigned long __bus_to_virt(unsigned long);
#elif defined(CONFIG_FOOTBRIDGE_HOST)
/*
- * The footbridge is programmed to expose the system RAM at the corresponding
- * address. So, if PAGE_OFFSET is 0xc0000000, RAM appears at 0xe0000000.
- * If 0x80000000, then its exposed at 0xa0000000 on the bus. etc.
- * The only requirement is that the RAM isn't placed at bus address 0 which
+ * The footbridge is programmed to expose the system RAM at 0xe0000000.
+ * The requirement is that the RAM isn't placed at bus address 0, which
* would clash with VGA cards.
*/
-#define __virt_to_bus(x) ((x) - 0xe0000000)
-#define __bus_to_virt(x) ((x) + 0xe0000000)
+#define BUS_OFFSET 0xe0000000
+#define __virt_to_bus(x) ((x) + (BUS_OFFSET - PAGE_OFFSET))
+#define __bus_to_virt(x) ((x) - (BUS_OFFSET - PAGE_OFFSET))
+#define __pfn_to_bus(x) (__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET))
+#define __bus_to_pfn(x) __phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET))
#else
diff --git a/arch/arm/mach-integrator/include/mach/memory.h b/arch/arm/mach-integrator/include/mach/memory.h
index 4891828454f..991f24d2c11 100644
--- a/arch/arm/mach-integrator/include/mach/memory.h
+++ b/arch/arm/mach-integrator/include/mach/memory.h
@@ -28,6 +28,7 @@
#define BUS_OFFSET UL(0x80000000)
#define __virt_to_bus(x) ((x) - PAGE_OFFSET + BUS_OFFSET)
#define __bus_to_virt(x) ((x) - BUS_OFFSET + PAGE_OFFSET)
-#define __pfn_to_bus(x) (((x) << PAGE_SHIFT) + BUS_OFFSET)
+#define __pfn_to_bus(x) (__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET))
+#define __bus_to_pfn(x) __phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET))
#endif
diff --git a/arch/arm/mach-ixp2000/include/mach/memory.h b/arch/arm/mach-ixp2000/include/mach/memory.h
index aee7eb8a71b..98e3471be15 100644
--- a/arch/arm/mach-ixp2000/include/mach/memory.h
+++ b/arch/arm/mach-ixp2000/include/mach/memory.h
@@ -17,11 +17,15 @@
#include <mach/ixp2000-regs.h>
-#define __virt_to_bus(v) \
- (((__virt_to_phys(v) - 0x0) + (*IXP2000_PCI_SDRAM_BAR & 0xfffffff0)))
+#define IXP2000_PCI_SDRAM_OFFSET (*IXP2000_PCI_SDRAM_BAR & 0xfffffff0)
-#define __bus_to_virt(b) \
- __phys_to_virt((((b - (*IXP2000_PCI_SDRAM_BAR & 0xfffffff0)) + 0x0)))
+#define __phys_to_bus(x) ((x) + (IXP2000_PCI_SDRAM_OFFSET - PHYS_OFFSET))
+#define __bus_to_phys(x) ((x) - (IXP2000_PCI_SDRAM_OFFSET - PHYS_OFFSET))
+
+#define __virt_to_bus(v) __phys_to_bus(__virt_to_phys(v))
+#define __bus_to_virt(b) __phys_to_virt(__bus_to_phys(b))
+#define __pfn_to_bus(p) __phys_to_bus(__pfn_to_phys(p))
+#define __bus_to_pfn(b) __phys_to_pfn(__bus_to_phys(b))
#endif
diff --git a/arch/arm/mach-ixp23xx/include/mach/memory.h b/arch/arm/mach-ixp23xx/include/mach/memory.h
index fdd138706c7..94a3a86cfeb 100644
--- a/arch/arm/mach-ixp23xx/include/mach/memory.h
+++ b/arch/arm/mach-ixp23xx/include/mach/memory.h
@@ -19,16 +19,15 @@
*/
#define PHYS_OFFSET (0x00000000)
-#define __virt_to_bus(v) \
- ({ unsigned int ret; \
- ret = ((__virt_to_phys(v) - 0x00000000) + \
- (*((volatile int *)IXP23XX_PCI_SDRAM_BAR) & 0xfffffff0)); \
- ret; })
-
-#define __bus_to_virt(b) \
- ({ unsigned int data; \
- data = *((volatile int *)IXP23XX_PCI_SDRAM_BAR); \
- __phys_to_virt((((b - (data & 0xfffffff0)) + 0x00000000))); })
+#define IXP23XX_PCI_SDRAM_OFFSET (*((volatile int *)IXP23XX_PCI_SDRAM_BAR) & 0xfffffff0))
+
+#define __phys_to_bus(x) ((x) + (IXP23XX_PCI_SDRAM_OFFSET - PHYS_OFFSET))
+#define __bus_to_phys(x) ((x) - (IXP23XX_PCI_SDRAM_OFFSET - PHYS_OFFSET))
+
+#define __virt_to_bus(v) __phys_to_bus(__virt_to_phys(v))
+#define __bus_to_virt(b) __phys_to_virt(__bus_to_phys(b))
+#define __pfn_to_bus(p) __phys_to_bus(__pfn_to_phys(p))
+#define __bus_to_pfn(b) __phys_to_pfn(__bus_to_phys(b))
#define arch_is_coherent() 1
diff --git a/arch/arm/mach-lh7a40x/clocks.c b/arch/arm/mach-lh7a40x/clocks.c
index 6182f5410b4..fcaf876f19b 100644
--- a/arch/arm/mach-lh7a40x/clocks.c
+++ b/arch/arm/mach-lh7a40x/clocks.c
@@ -7,8 +7,6 @@
* version 2 as published by the Free Software Foundation.
*
*/
-
-#include <linux/cpufreq.h>
#include <mach/hardware.h>
#include <mach/clocks.h>
#include <linux/err.h>
@@ -31,12 +29,6 @@ struct clk {
#define HCLKDIV(c) (((c) >> 0) & 0x02)
#define PCLKDIV(c) (((c) >> 16) & 0x03)
-unsigned int cpufreq_get (unsigned int cpu) /* in kHz */
-{
- return fclkfreq_get ()/1000;
-}
-EXPORT_SYMBOL(cpufreq_get);
-
unsigned int fclkfreq_get (void)
{
unsigned int clkset = CSC_CLKSET;
diff --git a/arch/arm/mach-s3c24a0/include/mach/memory.h b/arch/arm/mach-s3c24a0/include/mach/memory.h
index 585211ca018..7d74fd5c8d6 100644
--- a/arch/arm/mach-s3c24a0/include/mach/memory.h
+++ b/arch/arm/mach-s3c24a0/include/mach/memory.h
@@ -15,5 +15,7 @@
#define __virt_to_bus(x) __virt_to_phys(x)
#define __bus_to_virt(x) __phys_to_virt(x)
+#define __pfn_to_bus(x) __pfn_to_phys(x)
+#define __bus_to_pfn(x) __phys_to_pfn(x)
#endif
diff --git a/arch/arm/mach-sa1100/Kconfig b/arch/arm/mach-sa1100/Kconfig
index 03a7f3857c5..b17d52f7cc4 100644
--- a/arch/arm/mach-sa1100/Kconfig
+++ b/arch/arm/mach-sa1100/Kconfig
@@ -4,6 +4,7 @@ menu "SA11x0 Implementations"
config SA1100_ASSABET
bool "Assabet"
+ select CPU_FREQ_SA1110
help
Say Y here if you are using the Intel(R) StrongARM(R) SA-1110
Microprocessor Development Board (also known as the Assabet).
@@ -19,6 +20,7 @@ config ASSABET_NEPONSET
config SA1100_CERF
bool "CerfBoard"
+ select CPU_FREQ_SA1110
help
The Intrinsyc CerfBoard is based on the StrongARM 1110 (Discontinued).
More information is available at:
@@ -45,6 +47,7 @@ endchoice
config SA1100_COLLIE
bool "Sharp Zaurus SL5500"
+ # FIXME: select CPU_FREQ_SA11x0
select SHARP_LOCOMO
select SHARP_SCOOP
select SHARP_PARAM
@@ -54,6 +57,7 @@ config SA1100_COLLIE
config SA1100_H3100
bool "Compaq iPAQ H3100"
select HTC_EGPIO
+ select CPU_FREQ_SA1100
help
Say Y here if you intend to run this kernel on the Compaq iPAQ
H3100 handheld computer. Information about this machine and the
@@ -64,6 +68,7 @@ config SA1100_H3100
config SA1100_H3600
bool "Compaq iPAQ H3600/H3700"
select HTC_EGPIO
+ select CPU_FREQ_SA1100
help
Say Y here if you intend to run this kernel on the Compaq iPAQ
H3600 handheld computer. Information about this machine and the
@@ -74,6 +79,7 @@ config SA1100_H3600
config SA1100_BADGE4
bool "HP Labs BadgePAD 4"
select SA1111
+ select CPU_FREQ_SA1100
help
Say Y here if you want to build a kernel for the HP Laboratories
BadgePAD 4.
@@ -81,6 +87,7 @@ config SA1100_BADGE4
config SA1100_JORNADA720
bool "HP Jornada 720"
select SA1111
+ # FIXME: select CPU_FREQ_SA11x0
help
Say Y here if you want to build a kernel for the HP Jornada 720
handheld computer. See <http://www.hp.com/jornada/products/720>
@@ -98,12 +105,14 @@ config SA1100_JORNADA720_SSP
config SA1100_HACKKIT
bool "HackKit Core CPU Board"
+ select CPU_FREQ_SA1100
help
Say Y here to support the HackKit Core CPU Board
<http://hackkit.eletztrick.de>;
config SA1100_LART
bool "LART"
+ select CPU_FREQ_SA1100
help
Say Y here if you are using the Linux Advanced Radio Terminal
(also known as the LART). See <http://www.lartmaker.nl/> for
@@ -111,6 +120,7 @@ config SA1100_LART
config SA1100_PLEB
bool "PLEB"
+ select CPU_FREQ_SA1100
help
Say Y here if you are using version 1 of the Portable Linux
Embedded Board (also known as PLEB).
@@ -119,6 +129,7 @@ config SA1100_PLEB
config SA1100_SHANNON
bool "Shannon"
+ select CPU_FREQ_SA1100
help
The Shannon (also known as a Tuxscreen, and also as a IS2630) was a
limited edition webphone produced by Philips. The Shannon is a SA1100
@@ -127,6 +138,7 @@ config SA1100_SHANNON
config SA1100_SIMPAD
bool "Simpad"
+ select CPU_FREQ_SA1110
help
The SIEMENS webpad SIMpad is based on the StrongARM 1110. There
are two different versions CL4 and SL4. CL4 has 32MB RAM and 16MB
@@ -145,3 +157,4 @@ config SA1100_SSP
endmenu
endif
+
diff --git a/arch/arm/mach-sa1100/generic.c b/arch/arm/mach-sa1100/generic.c
index 9faea1511c1..3c1fcd69671 100644
--- a/arch/arm/mach-sa1100/generic.c
+++ b/arch/arm/mach-sa1100/generic.c
@@ -58,7 +58,6 @@ static const unsigned short cclk_frequency_100khz[NR_FREQS] = {
2802 /* 280.2 MHz */
};
-#if defined(CONFIG_CPU_FREQ_SA1100) || defined(CONFIG_CPU_FREQ_SA1110)
/* rounds up(!) */
unsigned int sa11x0_freq_to_ppcr(unsigned int khz)
{
@@ -110,17 +109,6 @@ unsigned int sa11x0_getspeed(unsigned int cpu)
return cclk_frequency_100khz[PPCR & 0xf] * 100;
}
-#else
-/*
- * We still need to provide this so building without cpufreq works.
- */
-unsigned int cpufreq_get(unsigned int cpu)
-{
- return cclk_frequency_100khz[PPCR & 0xf] * 100;
-}
-EXPORT_SYMBOL(cpufreq_get);
-#endif
-
/*
* This is the SA11x0 sched_clock implementation. This has
* a resolution of 271ns, and a maximum value of 32025597s (370 days).
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 2d7423af119..aed05bc3c2e 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -38,16 +38,72 @@ union vfp_state *last_VFP_context[NR_CPUS];
*/
unsigned int VFP_arch;
+/*
+ * Per-thread VFP initialization.
+ */
+static void vfp_thread_flush(struct thread_info *thread)
+{
+ union vfp_state *vfp = &thread->vfpstate;
+ unsigned int cpu;
+
+ memset(vfp, 0, sizeof(union vfp_state));
+
+ vfp->hard.fpexc = FPEXC_EN;
+ vfp->hard.fpscr = FPSCR_ROUND_NEAREST;
+
+ /*
+ * Disable VFP to ensure we initialize it first. We must ensure
+ * that the modification of last_VFP_context[] and hardware disable
+ * are done for the same CPU and without preemption.
+ */
+ cpu = get_cpu();
+ if (last_VFP_context[cpu] == vfp)
+ last_VFP_context[cpu] = NULL;
+ fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
+ put_cpu();
+}
+
+static void vfp_thread_release(struct thread_info *thread)
+{
+ /* release case: Per-thread VFP cleanup. */
+ union vfp_state *vfp = &thread->vfpstate;
+ unsigned int cpu = thread->cpu;
+
+ if (last_VFP_context[cpu] == vfp)
+ last_VFP_context[cpu] = NULL;
+}
+
+/*
+ * When this function is called with the following 'cmd's, the following
+ * is true while this function is being run:
+ * THREAD_NOFTIFY_SWTICH:
+ * - the previously running thread will not be scheduled onto another CPU.
+ * - the next thread to be run (v) will not be running on another CPU.
+ * - thread->cpu is the local CPU number
+ * - not preemptible as we're called in the middle of a thread switch
+ * THREAD_NOTIFY_FLUSH:
+ * - the thread (v) will be running on the local CPU, so
+ * v === current_thread_info()
+ * - thread->cpu is the local CPU number at the time it is accessed,
+ * but may change at any time.
+ * - we could be preempted if tree preempt rcu is enabled, so
+ * it is unsafe to use thread->cpu.
+ * THREAD_NOTIFY_RELEASE:
+ * - the thread (v) will not be running on any CPU; it is a dead thread.
+ * - thread->cpu will be the last CPU the thread ran on, which may not
+ * be the current CPU.
+ * - we could be preempted if tree preempt rcu is enabled.
+ */
static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v)
{
struct thread_info *thread = v;
- union vfp_state *vfp;
- __u32 cpu = thread->cpu;
if (likely(cmd == THREAD_NOTIFY_SWITCH)) {
u32 fpexc = fmrx(FPEXC);
#ifdef CONFIG_SMP
+ unsigned int cpu = thread->cpu;
+
/*
* On SMP, if VFP is enabled, save the old state in
* case the thread migrates to a different CPU. The
@@ -74,25 +130,10 @@ static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v)
return NOTIFY_DONE;
}
- vfp = &thread->vfpstate;
- if (cmd == THREAD_NOTIFY_FLUSH) {
- /*
- * Per-thread VFP initialisation.
- */
- memset(vfp, 0, sizeof(union vfp_state));
-
- vfp->hard.fpexc = FPEXC_EN;
- vfp->hard.fpscr = FPSCR_ROUND_NEAREST;
-
- /*
- * Disable VFP to ensure we initialise it first.
- */
- fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
- }
-
- /* flush and release case: Per-thread VFP cleanup. */
- if (last_VFP_context[cpu] == vfp)
- last_VFP_context[cpu] = NULL;
+ if (cmd == THREAD_NOTIFY_FLUSH)
+ vfp_thread_flush(thread);
+ else
+ vfp_thread_release(thread);
return NOTIFY_DONE;
}