diff options
author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-12-13 19:39:35 +0000 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-12-13 19:39:35 +0000 |
commit | fc7736688b046f91170591625b38f12a839ba994 (patch) | |
tree | e7198a9fabfcea785cbb16375455dbdb6aa9871b /arch | |
parent | bc7ecbcbc2c0ff235382077b55de7896775afc16 (diff) | |
parent | 9074e144c10cba5d6bb6b326a8be5347d38e4473 (diff) |
Merge branch 'master' into devel
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/Kconfig | 5 | ||||
-rw-r--r-- | arch/arm/mach-clps711x/include/mach/memory.h | 2 | ||||
-rw-r--r-- | arch/arm/mach-footbridge/common.c | 22 | ||||
-rw-r--r-- | arch/arm/mach-footbridge/include/mach/memory.h | 15 | ||||
-rw-r--r-- | arch/arm/mach-integrator/include/mach/memory.h | 3 | ||||
-rw-r--r-- | arch/arm/mach-ixp2000/include/mach/memory.h | 12 | ||||
-rw-r--r-- | arch/arm/mach-ixp23xx/include/mach/memory.h | 19 | ||||
-rw-r--r-- | arch/arm/mach-lh7a40x/clocks.c | 8 | ||||
-rw-r--r-- | arch/arm/mach-s3c24a0/include/mach/memory.h | 2 | ||||
-rw-r--r-- | arch/arm/mach-sa1100/Kconfig | 13 | ||||
-rw-r--r-- | arch/arm/mach-sa1100/generic.c | 12 | ||||
-rw-r--r-- | arch/arm/vfp/vfpmodule.c | 83 |
12 files changed, 127 insertions, 69 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index cf8a99f19dc4..233a222752c0 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 e522b20bcbc2..f70d52be48a2 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 b97f529e58e8..41febc796b1c 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 cb16e59d87b6..8d64f4574087 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 4891828454f5..991f24d2c115 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 aee7eb8a71b2..98e3471be15b 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 fdd138706c70..94a3a86cfeb8 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 6182f5410b4d..fcaf876f19b6 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 585211ca0187..7d74fd5c8d66 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 03a7f3857c5e..b17d52f7cc48 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 9faea1511c1f..3c1fcd696714 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 2d7423af1197..aed05bc3c2ea 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; } |