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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-21 23:43:54 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-21 23:43:54 +0400 |
commit | 881bcabbde8bc13854a2cb30847abe181d31c5fd (patch) | |
tree | 4903428777c03b76d8f2b6cdc782098213300126 /arch/m68k | |
parent | e60b9a0346ee08af4715ee5b2d82f705fbe6e309 (diff) | |
parent | f25e918e3546477948be999c3a7d56b316d74e4b (diff) | |
download | linux-881bcabbde8bc13854a2cb30847abe181d31c5fd.tar.xz |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull m68k updates from Geert Uytterhoeven.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
m68k: Setup CROSS_COMPILE at the top
m68k: Correct the Atari ALLOWINT definition
m68k/video: Create <asm/vga.h>
m68k: Make sure {read,write}s[bwl]() are always defined
m68k/mm: Port OOM changes to do_page_fault()
scsi/atari: Make more functions static
scsi/atari: Revive "atascsi=" setup option
net/ariadne: Improve debug prints
m68k/atari: Change VME irq numbers from unsigned long to unsigned int
m68k/amiga: Use arch_initcall() for registering platform devices
m68k/amiga: Add error checks when registering platform devices
m68k/amiga: Mark z_dev_present() __init
m68k: Remove unused MAX_NOINT_IPL definition
Diffstat (limited to 'arch/m68k')
-rw-r--r-- | arch/m68k/Makefile | 13 | ||||
-rw-r--r-- | arch/m68k/amiga/platform.c | 126 | ||||
-rw-r--r-- | arch/m68k/atari/ataints.c | 4 | ||||
-rw-r--r-- | arch/m68k/include/asm/atariints.h | 4 | ||||
-rw-r--r-- | arch/m68k/include/asm/entry.h | 6 | ||||
-rw-r--r-- | arch/m68k/include/asm/io_mm.h | 7 | ||||
-rw-r--r-- | arch/m68k/include/asm/vga.h | 27 | ||||
-rw-r--r-- | arch/m68k/mm/fault.c | 42 |
8 files changed, 173 insertions, 56 deletions
diff --git a/arch/m68k/Makefile b/arch/m68k/Makefile index cf318f20c64d..41b3bc926bb1 100644 --- a/arch/m68k/Makefile +++ b/arch/m68k/Makefile @@ -16,6 +16,13 @@ KBUILD_DEFCONFIG := multi_defconfig +ifneq ($(SUBARCH),$(ARCH)) + ifeq ($(CROSS_COMPILE),) + CROSS_COMPILE := $(call cc-cross-prefix, \ + m68k-linux-gnu- m68k-linux- m68k-unknown-linux-gnu-) + endif +endif + # # Enable processor type. Ordering of these is important - we want to # use the minimum processor type of the range we support. The logic @@ -62,12 +69,6 @@ endif LDFLAGS := -m m68kelf KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds -ifneq ($(SUBARCH),$(ARCH)) - ifeq ($(CROSS_COMPILE),) - CROSS_COMPILE := $(call cc-cross-prefix, \ - m68k-linux-gnu- m68k-linux- m68k-unknown-linux-gnu-) - endif -endif ifdef CONFIG_SUN3 LDFLAGS_vmlinux = -N diff --git a/arch/m68k/amiga/platform.c b/arch/m68k/amiga/platform.c index 7fd8b41723ea..80076d368b7e 100644 --- a/arch/m68k/amiga/platform.c +++ b/arch/m68k/amiga/platform.c @@ -6,6 +6,7 @@ * for more details. */ +#include <linux/err.h> #include <linux/init.h> #include <linux/platform_device.h> #include <linux/zorro.h> @@ -46,18 +47,25 @@ static const struct resource zorro_resources[] __initconst = { static int __init amiga_init_bus(void) { + struct platform_device *pdev; + unsigned int n; + if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO)) return -ENODEV; - platform_device_register_simple("amiga-zorro", -1, zorro_resources, - AMIGAHW_PRESENT(ZORRO3) ? 4 : 2); + n = AMIGAHW_PRESENT(ZORRO3) ? 4 : 2; + pdev = platform_device_register_simple("amiga-zorro", -1, + zorro_resources, n); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + return 0; } subsys_initcall(amiga_init_bus); -static int z_dev_present(zorro_id id) +static int __init z_dev_present(zorro_id id) { unsigned int i; @@ -126,72 +134,122 @@ static const struct resource amiga_rtc_resource __initconst = { static int __init amiga_init_devices(void) { struct platform_device *pdev; + int error; if (!MACH_IS_AMIGA) return -ENODEV; /* video hardware */ - if (AMIGAHW_PRESENT(AMI_VIDEO)) - platform_device_register_simple("amiga-video", -1, NULL, 0); + if (AMIGAHW_PRESENT(AMI_VIDEO)) { + pdev = platform_device_register_simple("amiga-video", -1, NULL, + 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } /* sound hardware */ - if (AMIGAHW_PRESENT(AMI_AUDIO)) - platform_device_register_simple("amiga-audio", -1, NULL, 0); + if (AMIGAHW_PRESENT(AMI_AUDIO)) { + pdev = platform_device_register_simple("amiga-audio", -1, NULL, + 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } /* storage interfaces */ - if (AMIGAHW_PRESENT(AMI_FLOPPY)) - platform_device_register_simple("amiga-floppy", -1, NULL, 0); + if (AMIGAHW_PRESENT(AMI_FLOPPY)) { + pdev = platform_device_register_simple("amiga-floppy", -1, + NULL, 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } - if (AMIGAHW_PRESENT(A3000_SCSI)) - platform_device_register_simple("amiga-a3000-scsi", -1, - &a3000_scsi_resource, 1); + if (AMIGAHW_PRESENT(A3000_SCSI)) { + pdev = platform_device_register_simple("amiga-a3000-scsi", -1, + &a3000_scsi_resource, 1); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } - if (AMIGAHW_PRESENT(A4000_SCSI)) - platform_device_register_simple("amiga-a4000t-scsi", -1, - &a4000t_scsi_resource, 1); + if (AMIGAHW_PRESENT(A4000_SCSI)) { + pdev = platform_device_register_simple("amiga-a4000t-scsi", -1, + &a4000t_scsi_resource, + 1); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } if (AMIGAHW_PRESENT(A1200_IDE) || z_dev_present(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE)) { pdev = platform_device_register_simple("amiga-gayle-ide", -1, &a1200_ide_resource, 1); - platform_device_add_data(pdev, &a1200_ide_pdata, - sizeof(a1200_ide_pdata)); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + error = platform_device_add_data(pdev, &a1200_ide_pdata, + sizeof(a1200_ide_pdata)); + if (error) + return error; } if (AMIGAHW_PRESENT(A4000_IDE)) { pdev = platform_device_register_simple("amiga-gayle-ide", -1, &a4000_ide_resource, 1); - platform_device_add_data(pdev, &a4000_ide_pdata, - sizeof(a4000_ide_pdata)); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + error = platform_device_add_data(pdev, &a4000_ide_pdata, + sizeof(a4000_ide_pdata)); + if (error) + return error; } /* other I/O hardware */ - if (AMIGAHW_PRESENT(AMI_KEYBOARD)) - platform_device_register_simple("amiga-keyboard", -1, NULL, 0); + if (AMIGAHW_PRESENT(AMI_KEYBOARD)) { + pdev = platform_device_register_simple("amiga-keyboard", -1, + NULL, 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } - if (AMIGAHW_PRESENT(AMI_MOUSE)) - platform_device_register_simple("amiga-mouse", -1, NULL, 0); + if (AMIGAHW_PRESENT(AMI_MOUSE)) { + pdev = platform_device_register_simple("amiga-mouse", -1, NULL, + 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } - if (AMIGAHW_PRESENT(AMI_SERIAL)) - platform_device_register_simple("amiga-serial", -1, NULL, 0); + if (AMIGAHW_PRESENT(AMI_SERIAL)) { + pdev = platform_device_register_simple("amiga-serial", -1, + NULL, 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } - if (AMIGAHW_PRESENT(AMI_PARALLEL)) - platform_device_register_simple("amiga-parallel", -1, NULL, 0); + if (AMIGAHW_PRESENT(AMI_PARALLEL)) { + pdev = platform_device_register_simple("amiga-parallel", -1, + NULL, 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } /* real time clocks */ - if (AMIGAHW_PRESENT(A2000_CLK)) - platform_device_register_simple("rtc-msm6242", -1, - &amiga_rtc_resource, 1); + if (AMIGAHW_PRESENT(A2000_CLK)) { + pdev = platform_device_register_simple("rtc-msm6242", -1, + &amiga_rtc_resource, 1); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } - if (AMIGAHW_PRESENT(A3000_CLK)) - platform_device_register_simple("rtc-rp5c01", -1, - &amiga_rtc_resource, 1); + if (AMIGAHW_PRESENT(A3000_CLK)) { + pdev = platform_device_register_simple("rtc-rp5c01", -1, + &amiga_rtc_resource, 1); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + } return 0; } -device_initcall(amiga_init_devices); +arch_initcall(amiga_init_devices); diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c index 783d8f02360d..3f41092d1b70 100644 --- a/arch/m68k/atari/ataints.c +++ b/arch/m68k/atari/ataints.c @@ -206,7 +206,7 @@ void __init atari_init_IRQ(void) * hardware with a programmable int vector (probably a VME board). */ -unsigned long atari_register_vme_int(void) +unsigned int atari_register_vme_int(void) { int i; @@ -223,7 +223,7 @@ unsigned long atari_register_vme_int(void) EXPORT_SYMBOL(atari_register_vme_int); -void atari_unregister_vme_int(unsigned long irq) +void atari_unregister_vme_int(unsigned int irq) { if (irq >= VME_SOURCE_BASE && irq < VME_SOURCE_BASE + VME_MAX_SOURCES) { irq -= VME_SOURCE_BASE; diff --git a/arch/m68k/include/asm/atariints.h b/arch/m68k/include/asm/atariints.h index 656bbbf5a6ff..5fc13bdf9044 100644 --- a/arch/m68k/include/asm/atariints.h +++ b/arch/m68k/include/asm/atariints.h @@ -198,7 +198,7 @@ static inline int atari_irq_pending( unsigned irq ) return( get_mfp_bit( irq, MFP_PENDING ) ); } -unsigned long atari_register_vme_int( void ); -void atari_unregister_vme_int( unsigned long ); +unsigned int atari_register_vme_int(void); +void atari_unregister_vme_int(unsigned int); #endif /* linux/atariints.h */ diff --git a/arch/m68k/include/asm/entry.h b/arch/m68k/include/asm/entry.h index 622138dc7288..d7de0f1a8957 100644 --- a/arch/m68k/include/asm/entry.h +++ b/arch/m68k/include/asm/entry.h @@ -33,13 +33,11 @@ /* the following macro is used when enabling interrupts */ #if defined(MACH_ATARI_ONLY) - /* block out HSYNC on the atari */ -#define ALLOWINT (~0x400) -#define MAX_NOINT_IPL 3 + /* block out HSYNC = ipl 2 on the atari */ +#define ALLOWINT (~0x500) #else /* portable version */ #define ALLOWINT (~0x700) -#define MAX_NOINT_IPL 0 #endif /* machine compilation types */ #ifdef __ASSEMBLY__ diff --git a/arch/m68k/include/asm/io_mm.h b/arch/m68k/include/asm/io_mm.h index 0fb3468000e7..fa4324bcf566 100644 --- a/arch/m68k/include/asm/io_mm.h +++ b/arch/m68k/include/asm/io_mm.h @@ -278,6 +278,13 @@ static inline void isa_delay(void) #define readl(addr) in_le32(addr) #define writel(val,addr) out_le32((addr),(val)) +#define readsb(port, buf, nr) raw_insb((port), (u8 *)(buf), (nr)) +#define readsw(port, buf, nr) raw_insw((port), (u16 *)(buf), (nr)) +#define readsl(port, buf, nr) raw_insl((port), (u32 *)(buf), (nr)) +#define writesb(port, buf, nr) raw_outsb((port), (u8 *)(buf), (nr)) +#define writesw(port, buf, nr) raw_outsw((port), (u16 *)(buf), (nr)) +#define writesl(port, buf, nr) raw_outsl((port), (u32 *)(buf), (nr)) + #define mmiowb() static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size) diff --git a/arch/m68k/include/asm/vga.h b/arch/m68k/include/asm/vga.h new file mode 100644 index 000000000000..d3aa1401e7aa --- /dev/null +++ b/arch/m68k/include/asm/vga.h @@ -0,0 +1,27 @@ +#ifndef _ASM_M68K_VGA_H +#define _ASM_M68K_VGA_H + +#include <asm/raw_io.h> + +/* + * FIXME + * Ugh, we don't have PCI space, so map readb() and friends to use raw I/O + * accessors, which are identical to the z_*() Zorro bus accessors. + * This should make cirrusfb work again on Amiga + */ +#undef inb_p +#undef inw_p +#undef outb_p +#undef outw +#undef readb +#undef writeb +#undef writew +#define inb_p(port) 0 +#define inw_p(port) 0 +#define outb_p(port, val) do { } while (0) +#define outw(port, val) do { } while (0) +#define readb raw_inb +#define writeb raw_outb +#define writew raw_outw + +#endif /* _ASM_M68K_VGA_H */ diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c index 6b020a8461e7..aeebbb7b30f0 100644 --- a/arch/m68k/mm/fault.c +++ b/arch/m68k/mm/fault.c @@ -72,7 +72,8 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, { struct mm_struct *mm = current->mm; struct vm_area_struct * vma; - int write, fault; + int fault; + unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; #ifdef DEBUG printk ("do page fault:\nregs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld, %p\n", @@ -87,6 +88,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, if (in_atomic() || !mm) goto no_context; +retry: down_read(&mm->mmap_sem); vma = find_vma(mm, address); @@ -117,14 +119,13 @@ good_area: #ifdef DEBUG printk("do_page_fault: good_area\n"); #endif - write = 0; switch (error_code & 3) { default: /* 3: write, present */ /* fall through */ case 2: /* write, not present */ if (!(vma->vm_flags & VM_WRITE)) goto acc_err; - write++; + flags |= FAULT_FLAG_WRITE; break; case 1: /* read, present */ goto acc_err; @@ -139,10 +140,14 @@ good_area: * the fault. */ - fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0); + fault = handle_mm_fault(mm, vma, address, flags); #ifdef DEBUG printk("handle_mm_fault returns %d\n",fault); #endif + + if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) + return 0; + if (unlikely(fault & VM_FAULT_ERROR)) { if (fault & VM_FAULT_OOM) goto out_of_memory; @@ -150,10 +155,31 @@ good_area: goto bus_err; BUG(); } - if (fault & VM_FAULT_MAJOR) - current->maj_flt++; - else - current->min_flt++; + + /* + * Major/minor page fault accounting is only done on the + * initial attempt. If we go through a retry, it is extremely + * likely that the page will be found in page cache at that point. + */ + if (flags & FAULT_FLAG_ALLOW_RETRY) { + if (fault & VM_FAULT_MAJOR) + current->maj_flt++; + else + current->min_flt++; + if (fault & VM_FAULT_RETRY) { + /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk + * of starvation. */ + flags &= ~FAULT_FLAG_ALLOW_RETRY; + + /* + * No need to up_read(&mm->mmap_sem) as we would + * have already released it in __lock_page_or_retry + * in mm/filemap.c. + */ + + goto retry; + } + } up_read(&mm->mmap_sem); return 0; |