From 95b0f9ea66661681f6ae081ea28416744d622c07 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Mon, 8 Feb 2010 16:41:38 +0100 Subject: microblaze: Improve TLB calculation for small systems Systems with small amount of memory need to be handled differently. Linux can't allocate the whole 32MB with two TLBs because then there is no MMU protection. Signed-off-by: Michal Simek --- arch/microblaze/include/asm/setup.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/microblaze/include/asm/setup.h') diff --git a/arch/microblaze/include/asm/setup.h b/arch/microblaze/include/asm/setup.h index 6c72ed7eba98..9f195c094731 100644 --- a/arch/microblaze/include/asm/setup.h +++ b/arch/microblaze/include/asm/setup.h @@ -39,7 +39,8 @@ extern void of_platform_reset_gpio_probe(void); void time_init(void); void init_IRQ(void); void machine_early_init(const char *cmdline, unsigned int ram, - unsigned int fdt, unsigned int msr); + unsigned int fdt, unsigned int msr, unsigned int tlb0, + unsigned int tlb1); void machine_restart(char *cmd); void machine_shutdown(void); -- cgit v1.2.3 From c40d04df152a1111c5bbcb632278394dabd2b73d Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 28 Mar 2012 18:30:02 +0100 Subject: Disintegrate asm/system.h for Microblaze Disintegrate asm/system.h for Microblaze. Not compiled. Signed-off-by: David Howells cc: microblaze-uclinux@itee.uq.edu.au --- arch/microblaze/include/asm/atomic.h | 1 + arch/microblaze/include/asm/barrier.h | 27 ++++++++ arch/microblaze/include/asm/cmpxchg.h | 40 ++++++++++++ arch/microblaze/include/asm/exec.h | 14 ++++ arch/microblaze/include/asm/processor.h | 11 +++- arch/microblaze/include/asm/setup.h | 6 ++ arch/microblaze/include/asm/switch_to.h | 24 +++++++ arch/microblaze/include/asm/system.h | 104 ++---------------------------- arch/microblaze/kernel/cpu/pvr.c | 1 - arch/microblaze/kernel/microblaze_ksyms.c | 1 - arch/microblaze/kernel/process.c | 1 - arch/microblaze/kernel/prom.c | 1 - arch/microblaze/kernel/setup.c | 1 - arch/microblaze/kernel/timer.c | 1 - arch/microblaze/kernel/traps.c | 1 - arch/microblaze/lib/memcpy.c | 1 - arch/microblaze/mm/fault.c | 1 - 17 files changed, 129 insertions(+), 107 deletions(-) create mode 100644 arch/microblaze/include/asm/barrier.h create mode 100644 arch/microblaze/include/asm/cmpxchg.h create mode 100644 arch/microblaze/include/asm/exec.h create mode 100644 arch/microblaze/include/asm/switch_to.h (limited to 'arch/microblaze/include/asm/setup.h') diff --git a/arch/microblaze/include/asm/atomic.h b/arch/microblaze/include/asm/atomic.h index 615f53992c65..472d8bf726df 100644 --- a/arch/microblaze/include/asm/atomic.h +++ b/arch/microblaze/include/asm/atomic.h @@ -1,6 +1,7 @@ #ifndef _ASM_MICROBLAZE_ATOMIC_H #define _ASM_MICROBLAZE_ATOMIC_H +#include #include #include diff --git a/arch/microblaze/include/asm/barrier.h b/arch/microblaze/include/asm/barrier.h new file mode 100644 index 000000000000..df5be3e87044 --- /dev/null +++ b/arch/microblaze/include/asm/barrier.h @@ -0,0 +1,27 @@ +/* + * Copyright (C) 2006 Atmark Techno, Inc. + * + * 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. + */ + +#ifndef _ASM_MICROBLAZE_BARRIER_H +#define _ASM_MICROBLAZE_BARRIER_H + +#define nop() asm volatile ("nop") + +#define smp_read_barrier_depends() do {} while (0) +#define read_barrier_depends() do {} while (0) + +#define mb() barrier() +#define rmb() mb() +#define wmb() mb() +#define set_mb(var, value) do { var = value; mb(); } while (0) +#define set_wmb(var, value) do { var = value; wmb(); } while (0) + +#define smp_mb() mb() +#define smp_rmb() rmb() +#define smp_wmb() wmb() + +#endif /* _ASM_MICROBLAZE_BARRIER_H */ diff --git a/arch/microblaze/include/asm/cmpxchg.h b/arch/microblaze/include/asm/cmpxchg.h new file mode 100644 index 000000000000..0094859abd9b --- /dev/null +++ b/arch/microblaze/include/asm/cmpxchg.h @@ -0,0 +1,40 @@ +#ifndef _ASM_MICROBLAZE_CMPXCHG_H +#define _ASM_MICROBLAZE_CMPXCHG_H + +void __bad_xchg(volatile void *ptr, int size); + +static inline unsigned long __xchg(unsigned long x, volatile void *ptr, + int size) +{ + unsigned long ret; + unsigned long flags; + + switch (size) { + case 1: + local_irq_save(flags); + ret = *(volatile unsigned char *)ptr; + *(volatile unsigned char *)ptr = x; + local_irq_restore(flags); + break; + + case 4: + local_irq_save(flags); + ret = *(volatile unsigned long *)ptr; + *(volatile unsigned long *)ptr = x; + local_irq_restore(flags); + break; + default: + __bad_xchg(ptr, size), ret = 0; + break; + } + + return ret; +} + +#define xchg(ptr, x) \ + ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) + +#include +#include + +#endif /* _ASM_MICROBLAZE_CMPXCHG_H */ diff --git a/arch/microblaze/include/asm/exec.h b/arch/microblaze/include/asm/exec.h new file mode 100644 index 000000000000..e750de1fe8fb --- /dev/null +++ b/arch/microblaze/include/asm/exec.h @@ -0,0 +1,14 @@ +/* + * Copyright (C) 2006 Atmark Techno, Inc. + * + * 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. + */ + +#ifndef _ASM_MICROBLAZE_EXEC_H +#define _ASM_MICROBLAZE_EXEC_H + +#define arch_align_stack(x) (x) + +#endif /* _ASM_MICROBLAZE_EXEC_H */ diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index 7283bfb2f7e4..510a8e1c16ba 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -125,7 +125,6 @@ struct thread_struct { .pgdir = swapper_pg_dir, \ } - /* Free all resources held by a thread. */ extern inline void release_thread(struct task_struct *dead_task) { @@ -144,6 +143,8 @@ static inline void exit_thread(void) unsigned long get_wchan(struct task_struct *p); +extern void ret_from_fork(void); + /* The size allocated for kernel stacks. This _must_ be a power of two! */ # define KERNEL_STACK_SIZE 0x2000 @@ -166,6 +167,14 @@ unsigned long get_wchan(struct task_struct *p); # define STACK_TOP TASK_SIZE # define STACK_TOP_MAX STACK_TOP +void disable_hlt(void); +void enable_hlt(void); +void default_idle(void); + +#ifdef CONFIG_DEBUG_FS +extern struct dentry *of_debugfs_root; +#endif + # endif /* __ASSEMBLY__ */ # endif /* CONFIG_MMU */ #endif /* _ASM_MICROBLAZE_PROCESSOR_H */ diff --git a/arch/microblaze/include/asm/setup.h b/arch/microblaze/include/asm/setup.h index 6c72ed7eba98..aa22511819d8 100644 --- a/arch/microblaze/include/asm/setup.h +++ b/arch/microblaze/include/asm/setup.h @@ -20,6 +20,8 @@ extern unsigned int boot_cpuid; /* move to smp.h */ extern char cmd_line[COMMAND_LINE_SIZE]; +extern char *klimit; + void early_printk(const char *fmt, ...); int setup_early_printk(char *opt); @@ -46,6 +48,10 @@ void machine_shutdown(void); void machine_halt(void); void machine_power_off(void); +void free_init_pages(char *what, unsigned long begin, unsigned long end); +extern void *alloc_maybe_bootmem(size_t size, gfp_t mask); +extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask); + # endif/* __KERNEL__ */ # endif /* __ASSEMBLY__ */ #endif /* _ASM_MICROBLAZE_SETUP_H */ diff --git a/arch/microblaze/include/asm/switch_to.h b/arch/microblaze/include/asm/switch_to.h new file mode 100644 index 000000000000..f45baa2c5e09 --- /dev/null +++ b/arch/microblaze/include/asm/switch_to.h @@ -0,0 +1,24 @@ +/* + * Copyright (C) 2006 Atmark Techno, Inc. + * + * 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. + */ + +#ifndef _ASM_MICROBLAZE_SWITCH_TO_H +#define _ASM_MICROBLAZE_SWITCH_TO_H + +struct task_struct; +struct thread_info; + +extern struct task_struct *_switch_to(struct thread_info *prev, + struct thread_info *next); + +#define switch_to(prev, next, last) \ + do { \ + (last) = _switch_to(task_thread_info(prev), \ + task_thread_info(next)); \ + } while (0) + +#endif /* _ASM_MICROBLAZE_SWITCH_TO_H */ diff --git a/arch/microblaze/include/asm/system.h b/arch/microblaze/include/asm/system.h index 5a433cbaafb3..ccc4f86d16c5 100644 --- a/arch/microblaze/include/asm/system.h +++ b/arch/microblaze/include/asm/system.h @@ -1,97 +1,7 @@ -/* - * Copyright (C) 2006 Atmark Techno, Inc. - * - * 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. - */ - -#ifndef _ASM_MICROBLAZE_SYSTEM_H -#define _ASM_MICROBLAZE_SYSTEM_H - -#include -#include -#include -#include - -#include -#include - -struct task_struct; -struct thread_info; - -extern struct task_struct *_switch_to(struct thread_info *prev, - struct thread_info *next); - -#define switch_to(prev, next, last) \ - do { \ - (last) = _switch_to(task_thread_info(prev), \ - task_thread_info(next)); \ - } while (0) - -#define smp_read_barrier_depends() do {} while (0) -#define read_barrier_depends() do {} while (0) - -#define nop() asm volatile ("nop") -#define mb() barrier() -#define rmb() mb() -#define wmb() mb() -#define set_mb(var, value) do { var = value; mb(); } while (0) -#define set_wmb(var, value) do { var = value; wmb(); } while (0) - -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() - -void __bad_xchg(volatile void *ptr, int size); - -static inline unsigned long __xchg(unsigned long x, volatile void *ptr, - int size) -{ - unsigned long ret; - unsigned long flags; - - switch (size) { - case 1: - local_irq_save(flags); - ret = *(volatile unsigned char *)ptr; - *(volatile unsigned char *)ptr = x; - local_irq_restore(flags); - break; - - case 4: - local_irq_save(flags); - ret = *(volatile unsigned long *)ptr; - *(volatile unsigned long *)ptr = x; - local_irq_restore(flags); - break; - default: - __bad_xchg(ptr, size), ret = 0; - break; - } - - return ret; -} - -void disable_hlt(void); -void enable_hlt(void); -void default_idle(void); - -#define xchg(ptr, x) \ - ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) - -void free_init_pages(char *what, unsigned long begin, unsigned long end); -void free_initmem(void); -extern char *klimit; -extern void ret_from_fork(void); - -extern void *alloc_maybe_bootmem(size_t size, gfp_t mask); -extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask); - -#ifdef CONFIG_DEBUG_FS -extern struct dentry *of_debugfs_root; -#endif - -#define arch_align_stack(x) (x) - -#endif /* _ASM_MICROBLAZE_SYSTEM_H */ +/* FILE TO BE DELETED. DO NOT ADD STUFF HERE! */ +#include +#include +#include +#include +#include +extern void free_initmem(void); diff --git a/arch/microblaze/kernel/cpu/pvr.c b/arch/microblaze/kernel/cpu/pvr.c index 488c1ed24e38..3a749d5e71fd 100644 --- a/arch/microblaze/kernel/cpu/pvr.c +++ b/arch/microblaze/kernel/cpu/pvr.c @@ -12,7 +12,6 @@ #include #include -#include #include #include diff --git a/arch/microblaze/kernel/microblaze_ksyms.c b/arch/microblaze/kernel/microblaze_ksyms.c index 49faeb429599..bb4907c828dc 100644 --- a/arch/microblaze/kernel/microblaze_ksyms.c +++ b/arch/microblaze/kernel/microblaze_ksyms.c @@ -18,7 +18,6 @@ #include #include #include -#include #include #include diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index 9155f7d92669..883b92789cdf 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -13,7 +13,6 @@ #include #include #include -#include #include #include /* for USER_DS macros */ #include diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c index 80d314e81901..4a764ccb9f26 100644 --- a/arch/microblaze/kernel/prom.c +++ b/arch/microblaze/kernel/prom.c @@ -36,7 +36,6 @@ #include #include #include -#include #include #include #include diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c index 70e6d0b41ab4..7a9f39efbf32 100644 --- a/arch/microblaze/kernel/setup.c +++ b/arch/microblaze/kernel/setup.c @@ -30,7 +30,6 @@ #include #include -#include #include #include diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c index 3cb0bf640135..d3a38eca12d6 100644 --- a/arch/microblaze/kernel/timer.c +++ b/arch/microblaze/kernel/timer.c @@ -27,7 +27,6 @@ #include #include #include -#include #include #ifdef CONFIG_SELFMOD_TIMER diff --git a/arch/microblaze/kernel/traps.c b/arch/microblaze/kernel/traps.c index ba034d421ec2..5541ac559593 100644 --- a/arch/microblaze/kernel/traps.c +++ b/arch/microblaze/kernel/traps.c @@ -15,7 +15,6 @@ #include #include -#include #include void trap_init(void) diff --git a/arch/microblaze/lib/memcpy.c b/arch/microblaze/lib/memcpy.c index 52746e718dfa..fe9c53fafdea 100644 --- a/arch/microblaze/lib/memcpy.c +++ b/arch/microblaze/lib/memcpy.c @@ -30,7 +30,6 @@ #include #include -#include #ifdef __HAVE_ARCH_MEMCPY #ifndef CONFIG_OPT_LIB_FUNCTION diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c index ae97d2ccdc22..c38a265846de 100644 --- a/arch/microblaze/mm/fault.c +++ b/arch/microblaze/mm/fault.c @@ -33,7 +33,6 @@ #include #include #include -#include #include #include -- cgit v1.2.3