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authorLinus Torvalds <torvalds@linux-foundation.org>2019-09-30 10:16:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-30 10:16:17 -0700
commit80b29b6b8cd7479a67f5e338195dbc121b30c879 (patch)
tree6a48612f4b33233b7fd295ab095fcf9e281ea7d5
parentcef0aa0ce8592f68fb093b2be0d341a568ff9890 (diff)
parent9af032a30172e119a5935f802b066631f8ded2d6 (diff)
Merge tag 'csky-for-linus-5.4-rc1' of git://github.com/c-sky/csky-linux
Pull csky updates from Guo Ren: "This round of csky subsystem just some fixups: - Fix mb() synchronization problem - Fix dma_alloc_coherent with PAGE_SO attribute - Fix cache_op failed when cross memory ZONEs - Optimize arch_sync_dma_for_cpu/device with dma_inv_range - Fix ioremap function losing - Fix arch_get_unmapped_area() implementation - Fix defer cache flush for 610 - Support kernel non-aligned access - Fix 610 vipt cache flush mechanism - Fix add zero_fp fixup perf backtrace panic - Move static keyword to the front of declaration - Fix csky_pmu.max_period assignment - Use generic free_initrd_mem() - entry: Remove unneeded need_resched() loop" * tag 'csky-for-linus-5.4-rc1' of git://github.com/c-sky/csky-linux: csky: Move static keyword to the front of declaration csky: entry: Remove unneeded need_resched() loop csky: Fixup csky_pmu.max_period assignment csky: Fixup add zero_fp fixup perf backtrace panic csky: Use generic free_initrd_mem() csky: Fixup 610 vipt cache flush mechanism csky: Support kernel non-aligned access csky: Fixup defer cache flush for 610 csky: Fixup arch_get_unmapped_area() implementation csky: Fixup ioremap function losing csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_range csky/dma: Fixup cache_op failed when cross memory ZONEs csky: Fixup dma_alloc_coherent with PAGE_SO attribute csky: Fixup mb() synchronization problem
-rw-r--r--arch/csky/abiv1/alignment.c62
-rw-r--r--arch/csky/abiv1/cacheflush.c70
-rw-r--r--arch/csky/abiv1/inc/abi/cacheflush.h45
-rw-r--r--arch/csky/abiv1/inc/abi/page.h5
-rw-r--r--arch/csky/abiv1/mmap.c75
-rw-r--r--arch/csky/include/asm/barrier.h15
-rw-r--r--arch/csky/include/asm/cache.h1
-rw-r--r--arch/csky/include/asm/io.h23
-rw-r--r--arch/csky/include/asm/pgtable.h10
-rw-r--r--arch/csky/kernel/entry.S54
-rw-r--r--arch/csky/kernel/perf_event.c4
-rw-r--r--arch/csky/kernel/process.c2
-rw-r--r--arch/csky/mm/cachev1.c7
-rw-r--r--arch/csky/mm/cachev2.c11
-rw-r--r--arch/csky/mm/dma-mapping.c76
-rw-r--r--arch/csky/mm/init.c16
-rw-r--r--arch/csky/mm/ioremap.c27
17 files changed, 291 insertions, 212 deletions
diff --git a/arch/csky/abiv1/alignment.c b/arch/csky/abiv1/alignment.c
index 27ef5b2c43ab..cb2a0d94a144 100644
--- a/arch/csky/abiv1/alignment.c
+++ b/arch/csky/abiv1/alignment.c
@@ -5,8 +5,10 @@
#include <linux/uaccess.h>
#include <linux/ptrace.h>
-static int align_enable = 1;
-static int align_count;
+static int align_kern_enable = 1;
+static int align_usr_enable = 1;
+static int align_kern_count = 0;
+static int align_usr_count = 0;
static inline uint32_t get_ptreg(struct pt_regs *regs, uint32_t rx)
{
@@ -32,9 +34,6 @@ static int ldb_asm(uint32_t addr, uint32_t *valp)
uint32_t val;
int err;
- if (!access_ok((void *)addr, 1))
- return 1;
-
asm volatile (
"movi %0, 0\n"
"1:\n"
@@ -67,9 +66,6 @@ static int stb_asm(uint32_t addr, uint32_t val)
{
int err;
- if (!access_ok((void *)addr, 1))
- return 1;
-
asm volatile (
"movi %0, 0\n"
"1:\n"
@@ -203,8 +199,6 @@ static int stw_c(struct pt_regs *regs, uint32_t rz, uint32_t addr)
if (stb_asm(addr, byte3))
return 1;
- align_count++;
-
return 0;
}
@@ -226,7 +220,14 @@ void csky_alignment(struct pt_regs *regs)
uint32_t addr = 0;
if (!user_mode(regs))
+ goto kernel_area;
+
+ if (!align_usr_enable) {
+ pr_err("%s user disabled.\n", __func__);
goto bad_area;
+ }
+
+ align_usr_count++;
ret = get_user(tmp, (uint16_t *)instruction_pointer(regs));
if (ret) {
@@ -234,6 +235,19 @@ void csky_alignment(struct pt_regs *regs)
goto bad_area;
}
+ goto good_area;
+
+kernel_area:
+ if (!align_kern_enable) {
+ pr_err("%s kernel disabled.\n", __func__);
+ goto bad_area;
+ }
+
+ align_kern_count++;
+
+ tmp = *(uint16_t *)instruction_pointer(regs);
+
+good_area:
opcode = (uint32_t)tmp;
rx = opcode & 0xf;
@@ -286,18 +300,32 @@ bad_area:
force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)addr);
}
-static struct ctl_table alignment_tbl[4] = {
+static struct ctl_table alignment_tbl[5] = {
+ {
+ .procname = "kernel_enable",
+ .data = &align_kern_enable,
+ .maxlen = sizeof(align_kern_enable),
+ .mode = 0666,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .procname = "user_enable",
+ .data = &align_usr_enable,
+ .maxlen = sizeof(align_usr_enable),
+ .mode = 0666,
+ .proc_handler = &proc_dointvec
+ },
{
- .procname = "enable",
- .data = &align_enable,
- .maxlen = sizeof(align_enable),
+ .procname = "kernel_count",
+ .data = &align_kern_count,
+ .maxlen = sizeof(align_kern_count),
.mode = 0666,
.proc_handler = &proc_dointvec
},
{
- .procname = "count",
- .data = &align_count,
- .maxlen = sizeof(align_count),
+ .procname = "user_count",
+ .data = &align_usr_count,
+ .maxlen = sizeof(align_usr_count),
.mode = 0666,
.proc_handler = &proc_dointvec
},
diff --git a/arch/csky/abiv1/cacheflush.c b/arch/csky/abiv1/cacheflush.c
index 10af8b6fe322..9f1fe80cc847 100644
--- a/arch/csky/abiv1/cacheflush.c
+++ b/arch/csky/abiv1/cacheflush.c
@@ -11,42 +11,66 @@
#include <asm/cacheflush.h>
#include <asm/cachectl.h>
+#define PG_dcache_clean PG_arch_1
+
void flush_dcache_page(struct page *page)
{
- struct address_space *mapping = page_mapping(page);
- unsigned long addr;
+ struct address_space *mapping;
- if (mapping && !mapping_mapped(mapping)) {
- set_bit(PG_arch_1, &(page)->flags);
+ if (page == ZERO_PAGE(0))
return;
- }
- /*
- * We could delay the flush for the !page_mapping case too. But that
- * case is for exec env/arg pages and those are %99 certainly going to
- * get faulted into the tlb (and thus flushed) anyways.
- */
- addr = (unsigned long) page_address(page);
- dcache_wb_range(addr, addr + PAGE_SIZE);
+ mapping = page_mapping_file(page);
+
+ if (mapping && !page_mapcount(page))
+ clear_bit(PG_dcache_clean, &page->flags);
+ else {
+ dcache_wbinv_all();
+ if (mapping)
+ icache_inv_all();
+ set_bit(PG_dcache_clean, &page->flags);
+ }
}
+EXPORT_SYMBOL(flush_dcache_page);
-void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
- pte_t *pte)
+void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
+ pte_t *ptep)
{
- unsigned long addr;
+ unsigned long pfn = pte_pfn(*ptep);
struct page *page;
- unsigned long pfn;
- pfn = pte_pfn(*pte);
- if (unlikely(!pfn_valid(pfn)))
+ if (!pfn_valid(pfn))
return;
page = pfn_to_page(pfn);
- addr = (unsigned long) page_address(page);
+ if (page == ZERO_PAGE(0))
+ return;
+
+ if (!test_and_set_bit(PG_dcache_clean, &page->flags))
+ dcache_wbinv_all();
- if (vma->vm_flags & VM_EXEC ||
- pages_do_alias(addr, address & PAGE_MASK))
- cache_wbinv_all();
+ if (page_mapping_file(page)) {
+ if (vma->vm_flags & VM_EXEC)
+ icache_inv_all();
+ }
+}
+
+void flush_kernel_dcache_page(struct page *page)
+{
+ struct address_space *mapping;
+
+ mapping = page_mapping_file(page);
+
+ if (!mapping || mapping_mapped(mapping))
+ dcache_wbinv_all();
+}
+EXPORT_SYMBOL(flush_kernel_dcache_page);
+
+void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end)
+{
+ dcache_wbinv_all();
- clear_bit(PG_arch_1, &(page)->flags);
+ if (vma->vm_flags & VM_EXEC)
+ icache_inv_all();
}
diff --git a/arch/csky/abiv1/inc/abi/cacheflush.h b/arch/csky/abiv1/inc/abi/cacheflush.h
index 5f663aef9b1b..79ef9e8c1afd 100644
--- a/arch/csky/abiv1/inc/abi/cacheflush.h
+++ b/arch/csky/abiv1/inc/abi/cacheflush.h
@@ -4,46 +4,63 @@
#ifndef __ABI_CSKY_CACHEFLUSH_H
#define __ABI_CSKY_CACHEFLUSH_H
-#include <linux/compiler.h>
+#include <linux/mm.h>
#include <asm/string.h>
#include <asm/cache.h>
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
extern void flush_dcache_page(struct page *);
-#define flush_cache_mm(mm) cache_wbinv_all()
+#define flush_cache_mm(mm) dcache_wbinv_all()
#define flush_cache_page(vma, page, pfn) cache_wbinv_all()
#define flush_cache_dup_mm(mm) cache_wbinv_all()
+#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
+extern void flush_kernel_dcache_page(struct page *);
+
+#define flush_dcache_mmap_lock(mapping) xa_lock_irq(&mapping->i_pages)
+#define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&mapping->i_pages)
+
+static inline void flush_kernel_vmap_range(void *addr, int size)
+{
+ dcache_wbinv_all();
+}
+static inline void invalidate_kernel_vmap_range(void *addr, int size)
+{
+ dcache_wbinv_all();
+}
+
+#define ARCH_HAS_FLUSH_ANON_PAGE
+static inline void flush_anon_page(struct vm_area_struct *vma,
+ struct page *page, unsigned long vmaddr)
+{
+ if (PageAnon(page))
+ cache_wbinv_all();
+}
+
/*
* if (current_mm != vma->mm) cache_wbinv_range(start, end) will be broken.
* Use cache_wbinv_all() here and need to be improved in future.
*/
-#define flush_cache_range(vma, start, end) cache_wbinv_all()
-#define flush_cache_vmap(start, end) cache_wbinv_range(start, end)
-#define flush_cache_vunmap(start, end) cache_wbinv_range(start, end)
+extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
+#define flush_cache_vmap(start, end) cache_wbinv_all()
+#define flush_cache_vunmap(start, end) cache_wbinv_all()
-#define flush_icache_page(vma, page) cache_wbinv_all()
+#define flush_icache_page(vma, page) do {} while (0);
#define flush_icache_range(start, end) cache_wbinv_range(start, end)
-#define flush_icache_user_range(vma, pg, adr, len) \
- cache_wbinv_range(adr, adr + len)
+#define flush_icache_user_range(vma,page,addr,len) \
+ flush_dcache_page(page)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
do { \
- cache_wbinv_all(); \
memcpy(dst, src, len); \
- cache_wbinv_all(); \
} while (0)
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
- cache_wbinv_all(); \
memcpy(dst, src, len); \
cache_wbinv_all(); \
} while (0)
-#define flush_dcache_mmap_lock(mapping) do {} while (0)
-#define flush_dcache_mmap_unlock(mapping) do {} while (0)
-
#endif /* __ABI_CSKY_CACHEFLUSH_H */
diff --git a/arch/csky/abiv1/inc/abi/page.h b/arch/csky/abiv1/inc/abi/page.h
index 6336e92a103a..c864519117c7 100644
--- a/arch/csky/abiv1/inc/abi/page.h
+++ b/arch/csky/abiv1/inc/abi/page.h
@@ -1,13 +1,14 @@
/* SPDX-License-Identifier: GPL-2.0 */
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
-extern unsigned long shm_align_mask;
+#include <asm/shmparam.h>
+
extern void flush_dcache_page(struct page *page);
static inline unsigned long pages_do_alias(unsigned long addr1,
unsigned long addr2)
{
- return (addr1 ^ addr2) & shm_align_mask;
+ return (addr1 ^ addr2) & (SHMLBA-1);
}
static inline void clear_user_page(void *addr, unsigned long vaddr,
diff --git a/arch/csky/abiv1/mmap.c b/arch/csky/abiv1/mmap.c
index b462fd50b23a..6792aca49999 100644
--- a/arch/csky/abiv1/mmap.c
+++ b/arch/csky/abiv1/mmap.c
@@ -9,58 +9,63 @@
#include <linux/random.h>
#include <linux/io.h>
-unsigned long shm_align_mask = (0x4000 >> 1) - 1; /* Sane caches */
+#define COLOUR_ALIGN(addr,pgoff) \
+ ((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \
+ (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))
-#define COLOUR_ALIGN(addr, pgoff) \
- ((((addr) + shm_align_mask) & ~shm_align_mask) + \
- (((pgoff) << PAGE_SHIFT) & shm_align_mask))
-
-unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
+/*
+ * We need to ensure that shared mappings are correctly aligned to
+ * avoid aliasing issues with VIPT caches. We need to ensure that
+ * a specific page of an object is always mapped at a multiple of
+ * SHMLBA bytes.
+ *
+ * We unconditionally provide this function for all cases.
+ */
+unsigned long
+arch_get_unmapped_area(struct file *filp, unsigned long addr,
unsigned long len, unsigned long pgoff, unsigned long flags)
{
- struct vm_area_struct *vmm;
- int do_color_align;
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma;
+ int do_align = 0;
+ struct vm_unmapped_area_info info;
+
+ /*
+ * We only need to do colour alignment if either the I or D
+ * caches alias.
+ */
+ do_align = filp || (flags & MAP_SHARED);
+ /*
+ * We enforce the MAP_FIXED case.
+ */
if (flags & MAP_FIXED) {
- /*
- * We do not accept a shared mapping if it would violate
- * cache aliasing constraints.
- */
- if ((flags & MAP_SHARED) &&
- ((addr - (pgoff << PAGE_SHIFT)) & shm_align_mask))
+ if (flags & MAP_SHARED &&
+ (addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))
return -EINVAL;
return addr;
}
if (len > TASK_SIZE)
return -ENOMEM;
- do_color_align = 0;
- if (filp || (flags & MAP_SHARED))
- do_color_align = 1;
+
if (addr) {
- if (do_color_align)
+ if (do_align)
addr = COLOUR_ALIGN(addr, pgoff);
else
addr = PAGE_ALIGN(addr);
- vmm = find_vma(current->mm, addr);
+
+ vma = find_vma(mm, addr);
if (TASK_SIZE - len >= addr &&
- (!vmm || addr + len <= vmm->vm_start))
+ (!vma || addr + len <= vm_start_gap(vma)))
return addr;
}
- addr = TASK_UNMAPPED_BASE;
- if (do_color_align)
- addr = COLOUR_ALIGN(addr, pgoff);
- else
- addr = PAGE_ALIGN(addr);
- for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
- /* At this point: (!vmm || addr < vmm->vm_end). */
- if (TASK_SIZE - len < addr)
- return -ENOMEM;
- if (!vmm || addr + len <= vmm->vm_start)
- return addr;
- addr = vmm->vm_end;
- if (do_color_align)
- addr = COLOUR_ALIGN(addr, pgoff);
- }
+ info.flags = 0;
+ info.length = len;
+ info.low_limit = mm->mmap_base;
+ info.high_limit = TASK_SIZE;
+ info.align_mask = do_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
+ info.align_offset = pgoff << PAGE_SHIFT;
+ return vm_unmapped_area(&info);
}
diff --git a/arch/csky/include/asm/barrier.h b/arch/csky/include/asm/barrier.h
index 476eb786f22d..a430e7fddf35 100644
--- a/arch/csky/include/asm/barrier.h
+++ b/arch/csky/include/asm/barrier.h
@@ -9,11 +9,12 @@
#define nop() asm volatile ("nop\n":::"memory")
/*
- * sync: completion barrier
- * sync.s: completion barrier and shareable to other cores
- * sync.i: completion barrier with flush cpu pipeline
- * sync.is: completion barrier with flush cpu pipeline and shareable to
- * other cores
+ * sync: completion barrier, all sync.xx instructions
+ * guarantee the last response recieved by bus transaction
+ * made by ld/st instructions before sync.s
+ * sync.s: inherit from sync, but also shareable to other cores
+ * sync.i: inherit from sync, but also flush cpu pipeline
+ * sync.is: the same with sync.i + sync.s
*
* bar.brwarw: ordering barrier for all load/store instructions before it
* bar.brwarws: ordering barrier for all load/store instructions before it
@@ -27,9 +28,7 @@
*/
#ifdef CONFIG_CPU_HAS_CACHEV2
-#define mb() asm volatile ("bar.brwarw\n":::"memory")
-#define rmb() asm volatile ("bar.brar\n":::"memory")
-#define wmb() asm volatile ("bar.bwaw\n":::"memory")
+#define mb() asm volatile ("sync.s\n":::"memory")
#ifdef CONFIG_SMP
#define __smp_mb() asm volatile ("bar.brwarws\n":::"memory")
diff --git a/arch/csky/include/asm/cache.h b/arch/csky/include/asm/cache.h
index d68373463676..1d5fc2f78fd7 100644
--- a/arch/csky/include/asm/cache.h
+++ b/arch/csky/include/asm/cache.h
@@ -24,6 +24,7 @@ void cache_wbinv_range(unsigned long start, unsigned long end);
void cache_wbinv_all(void);
void dma_wbinv_range(unsigned long start, unsigned long end);
+void dma_inv_range(unsigned long start, unsigned long end);
void dma_wb_range(unsigned long start, unsigned long end);
#endif
diff --git a/arch/csky/include/asm/io.h b/arch/csky/include/asm/io.h
index c1dfa9c10e36..80d071e2567f 100644
--- a/arch/csky/include/asm/io.h
+++ b/arch/csky/include/asm/io.h
@@ -4,17 +4,10 @@
#ifndef __ASM_CSKY_IO_H
#define __ASM_CSKY_IO_H
-#include <abi/pgtable-bits.h>
+#include <asm/pgtable.h>
#include <linux/types.h>
#include <linux/version.h>
-extern void __iomem *ioremap(phys_addr_t offset, size_t size);
-
-extern void iounmap(void *addr);
-
-extern int remap_area_pages(unsigned long address, phys_addr_t phys_addr,
- size_t size, unsigned long flags);
-
/*
* I/O memory access primitives. Reads are ordered relative to any
* following Normal memory access. Writes are ordered relative to any prior
@@ -40,9 +33,17 @@ extern int remap_area_pages(unsigned long address, phys_addr_t phys_addr,
#define writel(v,c) ({ wmb(); writel_relaxed((v),(c)); mb(); })
#endif
-#define ioremap_nocache(phy, sz) ioremap(phy, sz)
-#define ioremap_wc ioremap_nocache
-#define ioremap_wt ioremap_nocache
+/*
+ * I/O memory mapping functions.
+ */
+extern void __iomem *ioremap_cache(phys_addr_t addr, size_t size);
+extern void __iomem *__ioremap(phys_addr_t addr, size_t size, pgprot_t prot);
+extern void iounmap(void *addr);
+
+#define ioremap(addr, size) __ioremap((addr), (size), pgprot_noncached(PAGE_KERNEL))
+#define ioremap_wc(addr, size) __ioremap((addr), (size), pgprot_writecombine(PAGE_KERNEL))
+#define ioremap_nocache(addr, size) ioremap((addr), (size))
+#define ioremap_cache ioremap_cache
#include <asm-generic/io.h>
diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h
index 0040b3a05b61..7c21985c60dc 100644
--- a/arch/csky/include/asm/pgtable.h
+++ b/arch/csky/include/asm/pgtable.h
@@ -258,6 +258,16 @@ static inline pgprot_t pgprot_noncached(pgprot_t _prot)
{
unsigned long prot = pgprot_val(_prot);
+ prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED | _PAGE_SO;
+
+ return __pgprot(prot);
+}
+
+#define pgprot_writecombine pgprot_writecombine
+static inline pgprot_t pgprot_writecombine(pgprot_t _prot)
+{
+ unsigned long prot = pgprot_val(_prot);
+
prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED;
return __pgprot(prot);
diff --git a/arch/csky/kernel/entry.S b/arch/csky/kernel/entry.S
index a7e84ccccbd8..a7a5b67df898 100644
--- a/arch/csky/kernel/entry.S
+++ b/arch/csky/kernel/entry.S
@@ -17,6 +17,12 @@
#define PTE_INDX_SHIFT 10
#define _PGDIR_SHIFT 22
+.macro zero_fp
+#ifdef CONFIG_STACKTRACE
+ movi r8, 0
+#endif
+.endm
+
.macro tlbop_begin name, val0, val1, val2
ENTRY(csky_\name)
mtcr a3, ss2
@@ -96,6 +102,7 @@ ENTRY(csky_\name)
SAVE_ALL 0
.endm
.macro tlbop_end is_write
+ zero_fp
RD_MEH a2
psrset ee, ie
mov a0, sp
@@ -120,6 +127,7 @@ tlbop_end 1
ENTRY(csky_systemcall)
SAVE_ALL TRAP0_SIZE
+ zero_fp
psrset ee, ie
@@ -136,9 +144,9 @@ ENTRY(csky_systemcall)
mov r9, sp
bmaski r10, THREAD_SHIFT
andn r9, r10
- ldw r8, (r9, TINFO_FLAGS)
- ANDI_R3 r8, (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT | _TIF_SYSCALL_AUDIT)
- cmpnei r8, 0
+ ldw r12, (r9, TINFO_FLAGS)
+ ANDI_R3 r12, (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT | _TIF_SYSCALL_AUDIT)
+ cmpnei r12, 0
bt csky_syscall_trace
#if defined(__CSKYABIV2__)
subi sp, 8
@@ -180,7 +188,7 @@ csky_syscall_trace:
ENTRY(ret_from_kernel_thread)
jbsr schedule_tail
- mov a0, r8
+ mov a0, r10
jsr r9
jbsr ret_from_exception
@@ -189,9 +197,9 @@ ENTRY(ret_from_fork)
mov r9, sp
bmaski r10, THREAD_SHIFT
andn r9, r10
- ldw r8, (r9, TINFO_FLAGS)
- ANDI_R3 r8, (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT | _TIF_SYSCALL_AUDIT)
- cmpnei r8, 0
+ ldw r12, (r9, TINFO_FLAGS)
+ ANDI_R3 r12, (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT | _TIF_SYSCALL_AUDIT)
+ cmpnei r12, 0
bf ret_from_exception
mov a0, sp /* sp = pt_regs pointer */
jbsr syscall_trace_exit
@@ -209,9 +217,9 @@ ret_from_exception:
bmaski r10, THREAD_SHIFT
andn r9, r10
- ldw r8, (r9, TINFO_FLAGS)
- andi r8, (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED)
- cmpnei r8, 0
+ ldw r12, (r9, TINFO_FLAGS)
+ andi r12, (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED)
+ cmpnei r12, 0
bt exit_work
1:
RESTORE_ALL
@@ -220,11 +228,11 @@ exit_work:
lrw syscallid, ret_from_exception
mov lr, syscallid
- btsti r8, TIF_NEED_RESCHED
+ btsti r12, TIF_NEED_RESCHED
bt work_resched
mov a0, sp
- mov a1, r8
+ mov a1, r12
jmpi do_notify_resume
work_resched:
@@ -232,6 +240,7 @@ work_resched:
ENTRY(csky_trap)
SAVE_ALL 0
+ zero_fp
psrset ee
mov a0, sp /* Push Stack pointer arg */
jbsr trap_c /* Call C-level trap handler */
@@ -265,6 +274,7 @@ ENTRY(csky_get_tls)
ENTRY(csky_irq)
SAVE_ALL 0
+ zero_fp
psrset ee
#ifdef CONFIG_PREEMPT
@@ -276,27 +286,23 @@ ENTRY(csky_irq)
* Get task_struct->stack.preempt_count for current,
* and increase 1.
*/
- ldw r8, (r9, TINFO_PREEMPT)
- addi r8, 1
- stw r8, (r9, TINFO_PREEMPT)
+ ldw r12, (r9, TINFO_PREEMPT)
+ addi r12, 1
+ stw r12, (r9, TINFO_PREEMPT)
#endif
mov a0, sp
jbsr csky_do_IRQ
#ifdef CONFIG_PREEMPT
- subi r8, 1
- stw r8, (r9, TINFO_PREEMPT)
- cmpnei r8, 0
+ subi r12, 1
+ stw r12, (r9, TINFO_PREEMPT)
+ cmpnei r12, 0
bt 2f
- ldw r8, (r9, TINFO_FLAGS)
- btsti r8, TIF_NEED_RESCHED
+ ldw r12, (r9, TINFO_FLAGS)
+ btsti r12, TIF_NEED_RESCHED
bf 2f
-1:
jbsr preempt_schedule_irq /* irq en/disable is done inside */
- ldw r7, (r9, TINFO_FLAGS) /* get new tasks TI_FLAGS */
- btsti r7, TIF_NEED_RESCHED
- bt 1b /* go again */
#endif
2:
jmpi ret_from_exception
diff --git a/arch/csky/kernel/perf_event.c b/arch/csky/kernel/perf_event.c
index 4c1a1934d76a..1a29f1157449 100644
--- a/arch/csky/kernel/perf_event.c
+++ b/arch/csky/kernel/perf_event.c
@@ -1306,7 +1306,7 @@ int csky_pmu_device_probe(struct platform_device *pdev,
&csky_pmu.count_width)) {
csky_pmu.count_width = DEFAULT_COUNT_WIDTH;
}
- csky_pmu.max_period = BIT(csky_pmu.count_width) - 1;
+ csky_pmu.max_period = BIT_ULL(csky_pmu.count_width) - 1;
csky_pmu.plat_device = pdev;
@@ -1337,7 +1337,7 @@ int csky_pmu_device_probe(struct platform_device *pdev,
return ret;
}
-const static struct of_device_id csky_pmu_of_device_ids[] = {
+static const struct of_device_id csky_pmu_of_device_ids[] = {
{.compatible = "csky,csky-pmu"},
{},
};
diff --git a/arch/csky/kernel/process.c b/arch/csky/kernel/process.c
index e555740c0be5..f320d9248a22 100644
--- a/arch/csky/kernel/process.c
+++ b/arch/csky/kernel/process.c
@@ -55,7 +55,7 @@ int copy_thread(unsigned long clone_flags,
if (unlikely(p->flags & PF_KTHREAD)) {
memset(childregs, 0, sizeof(struct pt_regs));
childstack->r15 = (unsigned long) ret_from_kernel_thread;
- childstack->r8 = kthread_arg;
+ childstack->r10 = kthread_arg;
childstack->r9 = usp;
childregs->sr = mfcr("psr");
} else {
diff --git a/arch/csky/mm/cachev1.c b/arch/csky/mm/cachev1.c
index b8a75cce0b8c..494ec912abff 100644
--- a/arch/csky/mm/cachev1.c
+++ b/arch/csky/mm/cachev1.c
@@ -120,7 +120,12 @@ void dma_wbinv_range(unsigned long start, unsigned long end)
cache_op_range(start, end, DATA_CACHE|CACHE_CLR|CACHE_INV, 1);
}
+void dma_inv_range(unsigned long start, unsigned long end)
+{
+ cache_op_range(start, end, DATA_CACHE|CACHE_CLR|CACHE_INV, 1);
+}
+
void dma_wb_range(unsigned long start, unsigned long end)
{
- cache_op_range(start, end, DATA_CACHE|CACHE_INV, 1);
+ cache_op_range(start, end, DATA_CACHE|CACHE_CLR|CACHE_INV, 1);
}
diff --git a/arch/csky/mm/cachev2.c b/arch/csky/mm/cachev2.c
index baaf05d69f44..b61be6518e21 100644
--- a/arch/csky/mm/cachev2.c
+++ b/arch/csky/mm/cachev2.c
@@ -69,11 +69,20 @@ void dma_wbinv_range(unsigned long start, unsigned long end)
sync_is();
}
+void dma_inv_range(unsigned long start, unsigned long end)
+{
+ unsigned long i = start & ~(L1_CACHE_BYTES - 1);
+
+ for (; i < end; i += L1_CACHE_BYTES)
+ asm volatile("dcache.iva %0\n"::"r"(i):"memory");
+ sync_is();
+}
+
void dma_wb_range(unsigned long start, unsigned long end)
{
unsigned long i = start & ~(L1_CACHE_BYTES - 1);
for (; i < end; i += L1_CACHE_BYTES)
- asm volatile("dcache.civa %0\n"::"r"(i):"memory");
+ asm volatile("dcache.cva %0\n"::"r"(i):"memory");
sync_is();
}
diff --git a/arch/csky/mm/dma-mapping.c b/arch/csky/mm/dma-mapping.c
index 602a60d47a94..06e85b565454 100644
--- a/arch/csky/mm/dma-mapping.c
+++ b/arch/csky/mm/dma-mapping.c
@@ -14,69 +14,50 @@
#include <linux/version.h>
#include <asm/cache.h>
-void arch_dma_prep_coherent(struct page *page, size_t size)
-{
- if (PageHighMem(page)) {
- unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
-
- do {
- void *ptr = kmap_atomic(page);
- size_t _size = (size < PAGE_SIZE) ? size : PAGE_SIZE;
-
- memset(ptr, 0, _size);
- dma_wbinv_range((unsigned long)ptr,
- (unsigned long)ptr + _size);
-
- kunmap_atomic(ptr);
-
- page++;
- size -= PAGE_SIZE;
- count--;
- } while (count);
- } else {
- void *ptr = page_address(page);
-
- memset(ptr, 0, size);
- dma_wbinv_range((unsigned long)ptr, (unsigned long)ptr + size);
- }
-}
-
static inline void cache_op(phys_addr_t paddr, size_t size,
void (*fn)(unsigned long start, unsigned long end))
{
- struct page *page = pfn_to_page(paddr >> PAGE_SHIFT);
- unsigned int offset = paddr & ~PAGE_MASK;
- size_t left = size;
- unsigned long start;
+ struct page *page = phys_to_page(paddr);
+ void *start = __va(page_to_phys(page));
+ unsigned long offset = offset_in_page(paddr);
+ size_t left = size;
do {
size_t len = left;
+ if (offset + len > PAGE_SIZE)
+ len = PAGE_SIZE - offset;
+
if (PageHighMem(page)) {
- void *addr;
+ start = kmap_atomic(page);
- if (offset + len > PAGE_SIZE) {
- if (offset >= PAGE_SIZE) {
- page += offset >> PAGE_SHIFT;
- offset &= ~PAGE_MASK;
- }
- len = PAGE_SIZE - offset;
- }
+ fn((unsigned long)start + offset,
+ (unsigned long)start + offset + len);
- addr = kmap_atomic(page);
- start = (unsigned long)(addr + offset);
- fn(start, start + len);
- kunmap_atomic(addr);
+ kunmap_atomic(start);
} else {
- start = (unsigned long)phys_to_virt(paddr);
- fn(start, start + size);
+ fn((unsigned long)start + offset,
+ (unsigned long)start + offset + len);
}
offset = 0;
+
page++;
+ start += PAGE_SIZE;
left -= len;
} while (left);
}
+static void dma_wbinv_set_zero_range(unsigned long start, unsigned long end)
+{
+ memset((void *)start, 0, end - start);
+ dma_wbinv_range(start, end);
+}
+
+void arch_dma_prep_coherent(struct page *page, size_t size)
+{
+ cache_op(page_to_phys(page), size, dma_wbinv_set_zero_range);
+}
+
void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
size_t size, enum dma_data_direction dir)
{
@@ -98,11 +79,10 @@ void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
{
switch (dir) {
case DMA_TO_DEVICE:
- cache_op(paddr, size, dma_wb_range);
- break;
+ return;
case DMA_FROM_DEVICE:
case DMA_BIDIRECTIONAL:
- cache_op(paddr, size, dma_wbinv_range);
+ cache_op(paddr, size, dma_inv_range);
break;
default:
BUG();
diff --git a/arch/csky/mm/init.c b/arch/csky/mm/init.c
index eb0dc9e5065f..d4c2292ea46b 100644
--- a/arch/csky/mm/init.c
+++ b/arch/csky/mm/init.c
@@ -60,22 +60,6 @@ void __init mem_init(void)
mem_init_print_info(NULL);
}
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
- if (start < end)
- pr_info("Freeing initrd memory: %ldk freed\n",
- (end - start) >> 10);
-
- for (; start < end; start += PAGE_SIZE) {
- ClearPageReserved(virt_to_page(start));
- init_page_count(virt_to_page(start));
- free_page(start);
- totalram_pages_inc();
- }
-}
-#endif
-
extern char __init_begin[], __init_end[];
void free_initmem(void)
diff --git a/arch/csky/mm/ioremap.c b/arch/csky/mm/ioremap.c
index 8473b6bdf512..e13cd3497628 100644
--- a/arch/csky/mm/ioremap.c
+++ b/arch/csky/mm/ioremap.c
@@ -8,12 +8,12 @@
#include <asm/pgtable.h>
-void __iomem *ioremap(phys_addr_t addr, size_t size)
+static void __iomem *__ioremap_caller(phys_addr_t addr, size_t size,
+ pgprot_t prot, void *caller)
{
phys_addr_t last_addr;
unsigned long offset, vaddr;
struct vm_struct *area;
- pgprot_t prot;
last_addr = addr + size - 1;
if (!size || last_addr < addr)
@@ -23,15 +23,12 @@ void __iomem *ioremap(phys_addr_t addr, size_t size)
addr &= PAGE_MASK;
size = PAGE_ALIGN(size + offset);
- area = get_vm_area_caller(size, VM_ALLOC, __builtin_return_address(0));
+ area = get_vm_area_caller(size, VM_IOREMAP, caller);
if (!area)
return NULL;
vaddr = (unsigned long)area->addr;
- prot = __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE |
- _PAGE_GLOBAL | _CACHE_UNCACHED | _PAGE_SO);
-
if (ioremap_page_range(vaddr, vaddr + size, addr, prot)) {
free_vm_area(area);
return NULL;
@@ -39,7 +36,20 @@ void __iomem *ioremap(phys_addr_t addr, size_t size)
return (void __iomem *)(vaddr + offset);
}
-EXPORT_SYMBOL(ioremap);
+
+void __iomem *__ioremap(phys_addr_t phys_addr, size_t size, pgprot_t prot)
+{
+ return __ioremap_caller(phys_addr, size, prot,
+ __builtin_return_address(0));
+}
+EXPORT_SYMBOL(__ioremap);
+
+void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size)
+{
+ return __ioremap_caller(phys_addr, size, PAGE_KERNEL,
+ __builtin_return_address(0));
+}
+EXPORT_SYMBOL(ioremap_cache);
void iounmap(void __iomem *addr)
{
@@ -51,10 +61,9 @@ pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
unsigned long size, pgprot_t vma_prot)
{
if (!pfn_valid(pfn)) {
- vma_prot.pgprot |= _PAGE_SO;
return pgprot_noncached(vma_prot);
} else if (file->f_flags & O_SYNC) {
- return pgprot_noncached(vma_prot);
+ return pgprot_writecombine(vma_prot);
}
return vma_prot;

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