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csky-for-linus-5.4-rc1: arch/csky patches for 5.4-rc1
This round of csky subsystem just some fixups. Fixup: - Fixup mb() synchronization problem - Fixup dma_alloc_coherent with PAGE_SO attribute - Fixup cache_op failed when cross memory ZONEs - Optimize arch_sync_dma_for_cpu/device with dma_inv_range - Fixup ioremap function losing - Fixup arch_get_unmapped_area() implementation - Fixup defer cache flush for 610 - Support kernel non-aligned access - Fixup 610 vipt cache flush mechanism - Fixup add zero_fp fixup perf backtrace panic - Move static keyword to the front of declaration - Fixup csky_pmu.max_period assignment - Use generic free_initrd_mem() - entry: Remove unneeded need_resched() loop CI-Tested: https://gitlab.com/c-sky/buildroot/pipelines/77689888 -----BEGIN PGP SIGNATURE----- iQJGBAABCAAwFiEE2KAv+isbWR/viAKHAXH1GYaIxXsFAl2Rfc0SHHJlbl9ndW9A Yy1za3kuY29tAAoJEAFx9RmGiMV7eEUQAIuuO1ym/o7zMWZsIRbISJYi6xuq752W RVhnPv957ktFYlqrtelDuZwkCPnK03YDTv8lPzcIhes+xYtuspN6NMum7SUWPt4c IbfQe4GmMwPGNrJ76NO9YcWQig8flT75wWE2CzOjhGpBfEkEHmtbOvOiZujcq4yN vhj8TKF9CjOSaDJNCOXinC6DeGoftRYTSRq6NMPfFfHIWqFcZIyb1Fz8tE/vFP4Y qEoG/ys/eu114DIZVnxr5ihmrJ4gjxmlXlnYA8WMRnRt6/oHEmmbtHLTT2eHbI2T u4TCssqrLoNADV7g7zyAyBnrgf4dXnJivGjc2NzVLAkgNbEJn+oGNYn+kdiRGd5X 1CNVbzbZN0gHwLayDjJ4BWNxtpxxqmOjlDffjLVRW7dleTdfHvcxJwfhlvbQOPuq nMj4t1qJswn44f/bsj+F13hgXV0tWctYui/HS78xscE7t4yMNduf3JAm7TIxT0XN ej3102ffm4ycKZtfdwKwcACmMBJc+2QvGYmQo2L9pVLYIQe3QUWYs881V50PJXxV jdz4kmhpfKLie+yxmsdN1/8nTlcHF5wDiYwW9UColzfz1fCRkoPRx5tu/YI9zLoi K41CFEv4Z+aVzcp4HZNmOvVhGWgdmuwICMdY16wawhN6SAkvKJBFaP4g24h0J95M QyAPQl/VUMED =FLYg -----END PGP SIGNATURE----- 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
This commit is contained in:
Linus Torvalds
commit
80b29b6b8c
@ -5,8 +5,10 @@
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#include <linux/uaccess.h>
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#include <linux/ptrace.h>
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static int align_enable = 1;
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static int align_count;
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static int align_kern_enable = 1;
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static int align_usr_enable = 1;
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static int align_kern_count = 0;
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static int align_usr_count = 0;
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static inline uint32_t get_ptreg(struct pt_regs *regs, uint32_t rx)
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{
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@ -32,9 +34,6 @@ static int ldb_asm(uint32_t addr, uint32_t *valp)
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uint32_t val;
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int err;
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if (!access_ok((void *)addr, 1))
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return 1;
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asm volatile (
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"movi %0, 0\n"
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"1:\n"
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@ -67,9 +66,6 @@ static int stb_asm(uint32_t addr, uint32_t val)
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{
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int err;
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if (!access_ok((void *)addr, 1))
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return 1;
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asm volatile (
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"movi %0, 0\n"
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"1:\n"
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@ -203,8 +199,6 @@ static int stw_c(struct pt_regs *regs, uint32_t rz, uint32_t addr)
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if (stb_asm(addr, byte3))
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return 1;
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align_count++;
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return 0;
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}
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@ -226,7 +220,14 @@ void csky_alignment(struct pt_regs *regs)
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uint32_t addr = 0;
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if (!user_mode(regs))
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goto kernel_area;
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if (!align_usr_enable) {
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pr_err("%s user disabled.\n", __func__);
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goto bad_area;
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}
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align_usr_count++;
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ret = get_user(tmp, (uint16_t *)instruction_pointer(regs));
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if (ret) {
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@ -234,6 +235,19 @@ void csky_alignment(struct pt_regs *regs)
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goto bad_area;
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}
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goto good_area;
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kernel_area:
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if (!align_kern_enable) {
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pr_err("%s kernel disabled.\n", __func__);
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goto bad_area;
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}
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align_kern_count++;
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tmp = *(uint16_t *)instruction_pointer(regs);
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good_area:
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opcode = (uint32_t)tmp;
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rx = opcode & 0xf;
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@ -286,18 +300,32 @@ bad_area:
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force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)addr);
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}
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static struct ctl_table alignment_tbl[4] = {
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static struct ctl_table alignment_tbl[5] = {
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{
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.procname = "enable",
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.data = &align_enable,
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.maxlen = sizeof(align_enable),
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.procname = "kernel_enable",
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.data = &align_kern_enable,
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.maxlen = sizeof(align_kern_enable),
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.mode = 0666,
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.proc_handler = &proc_dointvec
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},
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{
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.procname = "count",
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.data = &align_count,
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.maxlen = sizeof(align_count),
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.procname = "user_enable",
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.data = &align_usr_enable,
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.maxlen = sizeof(align_usr_enable),
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.mode = 0666,
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.proc_handler = &proc_dointvec
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},
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{
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.procname = "kernel_count",
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.data = &align_kern_count,
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.maxlen = sizeof(align_kern_count),
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.mode = 0666,
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.proc_handler = &proc_dointvec
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},
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{
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.procname = "user_count",
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.data = &align_usr_count,
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.maxlen = sizeof(align_usr_count),
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.mode = 0666,
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.proc_handler = &proc_dointvec
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},
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@ -11,42 +11,66 @@
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#include <asm/cacheflush.h>
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#include <asm/cachectl.h>
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#define PG_dcache_clean PG_arch_1
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void flush_dcache_page(struct page *page)
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{
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struct address_space *mapping = page_mapping(page);
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unsigned long addr;
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struct address_space *mapping;
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if (mapping && !mapping_mapped(mapping)) {
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set_bit(PG_arch_1, &(page)->flags);
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if (page == ZERO_PAGE(0))
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return;
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mapping = page_mapping_file(page);
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if (mapping && !page_mapcount(page))
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clear_bit(PG_dcache_clean, &page->flags);
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else {
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dcache_wbinv_all();
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if (mapping)
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icache_inv_all();
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set_bit(PG_dcache_clean, &page->flags);
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}
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/*
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* We could delay the flush for the !page_mapping case too. But that
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* case is for exec env/arg pages and those are %99 certainly going to
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* get faulted into the tlb (and thus flushed) anyways.
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*/
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addr = (unsigned long) page_address(page);
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dcache_wb_range(addr, addr + PAGE_SIZE);
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}
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EXPORT_SYMBOL(flush_dcache_page);
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void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
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pte_t *pte)
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void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
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pte_t *ptep)
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{
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unsigned long addr;
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unsigned long pfn = pte_pfn(*ptep);
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struct page *page;
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unsigned long pfn;
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pfn = pte_pfn(*pte);
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if (unlikely(!pfn_valid(pfn)))
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if (!pfn_valid(pfn))
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return;
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page = pfn_to_page(pfn);
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addr = (unsigned long) page_address(page);
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if (page == ZERO_PAGE(0))
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return;
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if (vma->vm_flags & VM_EXEC ||
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pages_do_alias(addr, address & PAGE_MASK))
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cache_wbinv_all();
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if (!test_and_set_bit(PG_dcache_clean, &page->flags))
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dcache_wbinv_all();
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clear_bit(PG_arch_1, &(page)->flags);
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if (page_mapping_file(page)) {
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if (vma->vm_flags & VM_EXEC)
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icache_inv_all();
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}
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}
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void flush_kernel_dcache_page(struct page *page)
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{
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struct address_space *mapping;
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mapping = page_mapping_file(page);
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if (!mapping || mapping_mapped(mapping))
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dcache_wbinv_all();
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}
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EXPORT_SYMBOL(flush_kernel_dcache_page);
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void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end)
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{
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dcache_wbinv_all();
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if (vma->vm_flags & VM_EXEC)
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icache_inv_all();
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}
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@ -4,46 +4,63 @@
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#ifndef __ABI_CSKY_CACHEFLUSH_H
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#define __ABI_CSKY_CACHEFLUSH_H
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#include <linux/compiler.h>
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#include <linux/mm.h>
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#include <asm/string.h>
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#include <asm/cache.h>
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
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extern void flush_dcache_page(struct page *);
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#define flush_cache_mm(mm) cache_wbinv_all()
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#define flush_cache_mm(mm) dcache_wbinv_all()
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#define flush_cache_page(vma, page, pfn) cache_wbinv_all()
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#define flush_cache_dup_mm(mm) cache_wbinv_all()
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#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
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extern void flush_kernel_dcache_page(struct page *);
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#define flush_dcache_mmap_lock(mapping) xa_lock_irq(&mapping->i_pages)
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#define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&mapping->i_pages)
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static inline void flush_kernel_vmap_range(void *addr, int size)
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{
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dcache_wbinv_all();
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}
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static inline void invalidate_kernel_vmap_range(void *addr, int size)
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{
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dcache_wbinv_all();
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}
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#define ARCH_HAS_FLUSH_ANON_PAGE
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static inline void flush_anon_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vmaddr)
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{
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if (PageAnon(page))
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cache_wbinv_all();
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}
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/*
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* if (current_mm != vma->mm) cache_wbinv_range(start, end) will be broken.
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* Use cache_wbinv_all() here and need to be improved in future.
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*/
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#define flush_cache_range(vma, start, end) cache_wbinv_all()
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#define flush_cache_vmap(start, end) cache_wbinv_range(start, end)
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#define flush_cache_vunmap(start, end) cache_wbinv_range(start, end)
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extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
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#define flush_cache_vmap(start, end) cache_wbinv_all()
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#define flush_cache_vunmap(start, end) cache_wbinv_all()
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#define flush_icache_page(vma, page) cache_wbinv_all()
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#define flush_icache_page(vma, page) do {} while (0);
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#define flush_icache_range(start, end) cache_wbinv_range(start, end)
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#define flush_icache_user_range(vma, pg, adr, len) \
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cache_wbinv_range(adr, adr + len)
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#define flush_icache_user_range(vma,page,addr,len) \
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flush_dcache_page(page)
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#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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cache_wbinv_all(); \
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memcpy(dst, src, len); \
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cache_wbinv_all(); \
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} while (0)
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#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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cache_wbinv_all(); \
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memcpy(dst, src, len); \
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cache_wbinv_all(); \
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} while (0)
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#define flush_dcache_mmap_lock(mapping) do {} while (0)
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#define flush_dcache_mmap_unlock(mapping) do {} while (0)
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#endif /* __ABI_CSKY_CACHEFLUSH_H */
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@ -1,13 +1,14 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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extern unsigned long shm_align_mask;
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#include <asm/shmparam.h>
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extern void flush_dcache_page(struct page *page);
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static inline unsigned long pages_do_alias(unsigned long addr1,
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unsigned long addr2)
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{
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return (addr1 ^ addr2) & shm_align_mask;
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return (addr1 ^ addr2) & (SHMLBA-1);
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}
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static inline void clear_user_page(void *addr, unsigned long vaddr,
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@ -9,58 +9,63 @@
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#include <linux/random.h>
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#include <linux/io.h>
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unsigned long shm_align_mask = (0x4000 >> 1) - 1; /* Sane caches */
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#define COLOUR_ALIGN(addr,pgoff) \
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((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \
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(((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))
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#define COLOUR_ALIGN(addr, pgoff) \
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((((addr) + shm_align_mask) & ~shm_align_mask) + \
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(((pgoff) << PAGE_SHIFT) & shm_align_mask))
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unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
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/*
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* We need to ensure that shared mappings are correctly aligned to
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* avoid aliasing issues with VIPT caches. We need to ensure that
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* a specific page of an object is always mapped at a multiple of
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* SHMLBA bytes.
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*
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* We unconditionally provide this function for all cases.
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*/
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unsigned long
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arch_get_unmapped_area(struct file *filp, unsigned long addr,
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unsigned long len, unsigned long pgoff, unsigned long flags)
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{
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struct vm_area_struct *vmm;
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int do_color_align;
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struct mm_struct *mm = current->mm;
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struct vm_area_struct *vma;
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int do_align = 0;
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struct vm_unmapped_area_info info;
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/*
|
||||
* We only need to do colour alignment if either the I or D
|
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* caches alias.
|
||||
*/
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do_align = filp || (flags & MAP_SHARED);
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|
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/*
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* We enforce the MAP_FIXED case.
|
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*/
|
||||
if (flags & MAP_FIXED) {
|
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/*
|
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* We do not accept a shared mapping if it would violate
|
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* cache aliasing constraints.
|
||||
*/
|
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if ((flags & MAP_SHARED) &&
|
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((addr - (pgoff << PAGE_SHIFT)) & shm_align_mask))
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if (flags & MAP_SHARED &&
|
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(addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))
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return -EINVAL;
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return addr;
|
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}
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|
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if (len > TASK_SIZE)
|
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return -ENOMEM;
|
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do_color_align = 0;
|
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if (filp || (flags & MAP_SHARED))
|
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do_color_align = 1;
|
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|
||||
if (addr) {
|
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if (do_color_align)
|
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if (do_align)
|
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addr = COLOUR_ALIGN(addr, pgoff);
|
||||
else
|
||||
addr = PAGE_ALIGN(addr);
|
||||
vmm = find_vma(current->mm, addr);
|
||||
if (TASK_SIZE - len >= addr &&
|
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(!vmm || addr + len <= vmm->vm_start))
|
||||
return addr;
|
||||
}
|
||||
addr = TASK_UNMAPPED_BASE;
|
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if (do_color_align)
|
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addr = COLOUR_ALIGN(addr, pgoff);
|
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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)
|
||||
vma = find_vma(mm, addr);
|
||||
if (TASK_SIZE - len >= addr &&
|
||||
(!vma || addr + len <= vm_start_gap(vma)))
|
||||
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);
|
||||
}
|
||||
|
||||
@ -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")
|
||||
|
||||
@ -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
|
||||
|
||||
@ -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>
|
||||
|
||||
|
||||
@ -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);
|
||||
|
||||
@ -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
|
||||
|
||||
@ -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"},
|
||||
{},
|
||||
};
|
||||
|
||||
@ -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 {
|
||||
|
||||
@ -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);
|
||||
}
|
||||
|
||||
@ -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();
|
||||
}
|
||||
|
||||
@ -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();
|
||||
|
||||
@ -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)
|
||||
|
||||
@ -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;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user