diff options
| -rw-r--r-- | arch/arm64/include/asm/cacheflush.h | 5 | ||||
| -rw-r--r-- | arch/arm64/include/asm/proc-fns.h | 4 | ||||
| -rw-r--r-- | arch/arm64/include/asm/system_misc.h | 1 | ||||
| -rw-r--r-- | arch/arm64/kernel/process.c | 12 | ||||
| -rw-r--r-- | arch/arm64/mm/cache.S | 73 | ||||
| -rw-r--r-- | arch/arm64/mm/flush.c | 1 | ||||
| -rw-r--r-- | arch/arm64/mm/proc.S | 46 |
7 files changed, 1 insertions, 141 deletions
diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index 67d309c..c75b8d0 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -40,10 +40,6 @@ * the implementation assumes non-aliasing VIPT D-cache and (aliasing) * VIPT or ASID-tagged VIVT I-cache. * - * flush_cache_all() - * - * Unconditionally clean and invalidate the entire cache. - * * flush_cache_mm(mm) * * Clean and invalidate all user space cache entries @@ -69,7 +65,6 @@ * - kaddr - page address * - size - region size */ -extern void flush_cache_all(void); extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end); extern void flush_icache_range(unsigned long start, unsigned long end); extern void __flush_dcache_area(void *addr, size_t len); diff --git a/arch/arm64/include/asm/proc-fns.h b/arch/arm64/include/asm/proc-fns.h index 220633b7..14ad6e4 100644 --- a/arch/arm64/include/asm/proc-fns.h +++ b/arch/arm64/include/asm/proc-fns.h @@ -28,12 +28,8 @@ struct mm_struct; struct cpu_suspend_ctx; -extern void cpu_cache_off(void); extern void cpu_do_idle(void); extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm); -extern void cpu_reset(unsigned long addr) __attribute__((noreturn)); -void cpu_soft_restart(phys_addr_t cpu_reset, - unsigned long addr) __attribute__((noreturn)); extern void cpu_do_suspend(struct cpu_suspend_ctx *ptr); extern u64 cpu_do_resume(phys_addr_t ptr, u64 idmap_ttbr); diff --git a/arch/arm64/include/asm/system_misc.h b/arch/arm64/include/asm/system_misc.h index 7a18fab..659fbf5 100644 --- a/arch/arm64/include/asm/system_misc.h +++ b/arch/arm64/include/asm/system_misc.h @@ -41,7 +41,6 @@ struct mm_struct; extern void show_pte(struct mm_struct *mm, unsigned long addr); extern void __show_regs(struct pt_regs *); -void soft_restart(unsigned long); extern void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); #define UDBG_UNDEFINED (1 << 0) diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index c6b1f3b..c506bee 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -58,14 +58,6 @@ unsigned long __stack_chk_guard __read_mostly; EXPORT_SYMBOL(__stack_chk_guard); #endif -void soft_restart(unsigned long addr) -{ - setup_mm_for_reboot(); - cpu_soft_restart(virt_to_phys(cpu_reset), addr); - /* Should never get here */ - BUG(); -} - /* * Function pointers to optional machine specific functions */ @@ -136,9 +128,7 @@ void machine_power_off(void) /* * Restart requires that the secondary CPUs stop performing any activity - * while the primary CPU resets the system. Systems with a single CPU can - * use soft_restart() as their machine descriptor's .restart hook, since that - * will cause the only available CPU to reset. Systems with multiple CPUs must + * while the primary CPU resets the system. Systems with multiple CPUs must * provide a HW restart implementation, to ensure that all CPUs reset at once. * This is required so that any code running after reset on the primary CPU * doesn't have to co-ordinate with other CPUs to ensure they aren't still diff --git a/arch/arm64/mm/cache.S b/arch/arm64/mm/cache.S index 2560e1e..f563e9a 100644 --- a/arch/arm64/mm/cache.S +++ b/arch/arm64/mm/cache.S @@ -27,79 +27,6 @@ #include "proc-macros.S" /* - * __flush_dcache_all() - * - * Flush the whole D-cache. - * - * Corrupted registers: x0-x7, x9-x11 - */ -__flush_dcache_all: - dmb sy // ensure ordering with previous memory accesses - mrs x0, clidr_el1 // read clidr - and x3, x0, #0x7000000 // extract loc from clidr - lsr x3, x3, #23 // left align loc bit field - cbz x3, finished // if loc is 0, then no need to clean - mov x10, #0 // start clean at cache level 0 -loop1: - add x2, x10, x10, lsr #1 // work out 3x current cache level - lsr x1, x0, x2 // extract cache type bits from clidr - and x1, x1, #7 // mask of the bits for current cache only - cmp x1, #2 // see what cache we have at this level - b.lt skip // skip if no cache, or just i-cache - save_and_disable_irqs x9 // make CSSELR and CCSIDR access atomic - msr csselr_el1, x10 // select current cache level in csselr - isb // isb to sych the new cssr&csidr - mrs x1, ccsidr_el1 // read the new ccsidr - restore_irqs x9 - and x2, x1, #7 // extract the length of the cache lines - add x2, x2, #4 // add 4 (line length offset) - mov x4, #0x3ff - and x4, x4, x1, lsr #3 // find maximum number on the way size - clz w5, w4 // find bit position of way size increment - mov x7, #0x7fff - and x7, x7, x1, lsr #13 // extract max number of the index size -loop2: - mov x9, x4 // create working copy of max way size -loop3: - lsl x6, x9, x5 - orr x11, x10, x6 // factor way and cache number into x11 - lsl x6, x7, x2 - orr x11, x11, x6 // factor index number into x11 - dc cisw, x11 // clean & invalidate by set/way - subs x9, x9, #1 // decrement the way - b.ge loop3 - subs x7, x7, #1 // decrement the index - b.ge loop2 -skip: - add x10, x10, #2 // increment cache number - cmp x3, x10 - b.gt loop1 -finished: - mov x10, #0 // swith back to cache level 0 - msr csselr_el1, x10 // select current cache level in csselr - dsb sy - isb - ret -ENDPROC(__flush_dcache_all) - -/* - * flush_cache_all() - * - * Flush the entire cache system. The data cache flush is now achieved - * using atomic clean / invalidates working outwards from L1 cache. This - * is done using Set/Way based cache maintainance instructions. The - * instruction cache can still be invalidated back to the point of - * unification in a single instruction. - */ -ENTRY(flush_cache_all) - mov x12, lr - bl __flush_dcache_all - mov x0, #0 - ic ialluis // I+BTB cache invalidate - ret x12 -ENDPROC(flush_cache_all) - -/* * flush_icache_range(start,end) * * Ensure that the I and D caches are coherent within specified region. diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c index b6f14e8..4dfa397 100644 --- a/arch/arm64/mm/flush.c +++ b/arch/arm64/mm/flush.c @@ -102,7 +102,6 @@ EXPORT_SYMBOL(flush_dcache_page); /* * Additional functions defined in assembly. */ -EXPORT_SYMBOL(flush_cache_all); EXPORT_SYMBOL(flush_icache_range); #ifdef CONFIG_TRANSPARENT_HUGEPAGE diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index cdd754e..39139a3 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -46,52 +46,6 @@ #define MAIR(attr, mt) ((attr) << ((mt) * 8)) /* - * cpu_cache_off() - * - * Turn the CPU D-cache off. - */ -ENTRY(cpu_cache_off) - mrs x0, sctlr_el1 - bic x0, x0, #1 << 2 // clear SCTLR.C - msr sctlr_el1, x0 - isb - ret -ENDPROC(cpu_cache_off) - -/* - * cpu_reset(loc) - * - * Perform a soft reset of the system. Put the CPU into the same state - * as it would be if it had been reset, and branch to what would be the - * reset vector. It must be executed with the flat identity mapping. - * - * - loc - location to jump to for soft reset - */ - .align 5 -ENTRY(cpu_reset) - mrs x1, sctlr_el1 - bic x1, x1, #1 - msr sctlr_el1, x1 // disable the MMU - isb - ret x0 -ENDPROC(cpu_reset) - -ENTRY(cpu_soft_restart) - /* Save address of cpu_reset() and reset address */ - mov x19, x0 - mov x20, x1 - - /* Turn D-cache off */ - bl cpu_cache_off - - /* Push out all dirty data, and ensure cache is empty */ - bl flush_cache_all - - mov x0, x20 - ret x19 -ENDPROC(cpu_soft_restart) - -/* * cpu_do_idle() * * Idle the processor (wait for interrupt). |