summaryrefslogtreecommitdiffstats
path: root/arch/mips/mm/cache.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
commitcf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch)
tree757a3d280760c654767631cab5ad8af2d86d1848 /arch/mips/mm/cache.c
downloadlinux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.tar.gz
linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.zip
Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ...
Diffstat (limited to 'arch/mips/mm/cache.c')
-rw-r--r--arch/mips/mm/cache.c218
1 files changed, 218 insertions, 0 deletions
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
new file mode 100644
index 000000000..ad9b0430a
--- /dev/null
+++ b/arch/mips/mm/cache.c
@@ -0,0 +1,218 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1994 - 2003, 06, 07 by Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2007 MIPS Technologies, Inc.
+ */
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/kernel.h>
+#include <linux/linkage.h>
+#include <linux/export.h>
+#include <linux/sched.h>
+#include <linux/syscalls.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
+#include <linux/pagemap.h>
+
+#include <asm/bcache.h>
+#include <asm/cacheflush.h>
+#include <asm/processor.h>
+#include <asm/cpu.h>
+#include <asm/cpu-features.h>
+#include <asm/setup.h>
+#include <asm/pgtable.h>
+
+/* Cache operations. */
+void (*flush_cache_all)(void);
+void (*__flush_cache_all)(void);
+EXPORT_SYMBOL_GPL(__flush_cache_all);
+void (*flush_cache_mm)(struct mm_struct *mm);
+void (*flush_cache_range)(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end);
+void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page,
+ unsigned long pfn);
+void (*flush_icache_range)(unsigned long start, unsigned long end);
+EXPORT_SYMBOL_GPL(flush_icache_range);
+void (*local_flush_icache_range)(unsigned long start, unsigned long end);
+EXPORT_SYMBOL_GPL(local_flush_icache_range);
+void (*__flush_icache_user_range)(unsigned long start, unsigned long end);
+void (*__local_flush_icache_user_range)(unsigned long start, unsigned long end);
+EXPORT_SYMBOL_GPL(__local_flush_icache_user_range);
+
+void (*__flush_cache_vmap)(void);
+void (*__flush_cache_vunmap)(void);
+
+void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size);
+EXPORT_SYMBOL_GPL(__flush_kernel_vmap_range);
+
+/* MIPS specific cache operations */
+void (*flush_data_cache_page)(unsigned long addr);
+void (*flush_icache_all)(void);
+
+EXPORT_SYMBOL(flush_data_cache_page);
+EXPORT_SYMBOL(flush_icache_all);
+
+/*
+ * Dummy cache handling routine
+ */
+
+void cache_noop(void) {}
+
+#ifdef CONFIG_BOARD_SCACHE
+
+static struct bcache_ops no_sc_ops = {
+ .bc_enable = (void *)cache_noop,
+ .bc_disable = (void *)cache_noop,
+ .bc_wback_inv = (void *)cache_noop,
+ .bc_inv = (void *)cache_noop
+};
+
+struct bcache_ops *bcops = &no_sc_ops;
+#endif
+
+#ifdef CONFIG_DMA_NONCOHERENT
+
+/* DMA cache operations. */
+void (*_dma_cache_wback_inv)(unsigned long start, unsigned long size);
+void (*_dma_cache_wback)(unsigned long start, unsigned long size);
+void (*_dma_cache_inv)(unsigned long start, unsigned long size);
+
+#endif /* CONFIG_DMA_NONCOHERENT */
+
+/*
+ * We could optimize the case where the cache argument is not BCACHE but
+ * that seems very atypical use ...
+ */
+SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, bytes,
+ unsigned int, cache)
+{
+ if (bytes == 0)
+ return 0;
+ if (!access_ok((void __user *) addr, bytes))
+ return -EFAULT;
+
+ __flush_icache_user_range(addr, addr + bytes);
+
+ return 0;
+}
+
+void __flush_dcache_folio_pages(struct folio *folio, struct page *page,
+ unsigned int nr)
+{
+ struct address_space *mapping = folio_flush_mapping(folio);
+ unsigned long addr;
+ unsigned int i;
+
+ if (mapping && !mapping_mapped(mapping)) {
+ folio_set_dcache_dirty(folio);
+ return;
+ }
+
+ /*
+ * We could delay the flush for the !folio_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.
+ */
+ for (i = 0; i < nr; i++) {
+ addr = (unsigned long)kmap_local_page(page + i);
+ flush_data_cache_page(addr);
+ kunmap_local((void *)addr);
+ }
+}
+EXPORT_SYMBOL(__flush_dcache_folio_pages);
+
+void __flush_anon_page(struct page *page, unsigned long vmaddr)
+{
+ unsigned long addr = (unsigned long) page_address(page);
+ struct folio *folio = page_folio(page);
+
+ if (pages_do_alias(addr, vmaddr)) {
+ if (folio_mapped(folio) && !folio_test_dcache_dirty(folio)) {
+ void *kaddr;
+
+ kaddr = kmap_coherent(page, vmaddr);
+ flush_data_cache_page((unsigned long)kaddr);
+ kunmap_coherent();
+ } else
+ flush_data_cache_page(addr);
+ }
+}
+
+EXPORT_SYMBOL(__flush_anon_page);
+
+void __update_cache(unsigned long address, pte_t pte)
+{
+ struct folio *folio;
+ unsigned long pfn, addr;
+ int exec = !pte_no_exec(pte) && !cpu_has_ic_fills_f_dc;
+ unsigned int i;
+
+ pfn = pte_pfn(pte);
+ if (unlikely(!pfn_valid(pfn)))
+ return;
+
+ folio = page_folio(pfn_to_page(pfn));
+ address &= PAGE_MASK;
+ address -= offset_in_folio(folio, pfn << PAGE_SHIFT);
+
+ if (folio_test_dcache_dirty(folio)) {
+ for (i = 0; i < folio_nr_pages(folio); i++) {
+ addr = (unsigned long)kmap_local_folio(folio, i);
+
+ if (exec || pages_do_alias(addr, address))
+ flush_data_cache_page(addr);
+ kunmap_local((void *)addr);
+ address += PAGE_SIZE;
+ }
+ folio_clear_dcache_dirty(folio);
+ }
+}
+
+unsigned long _page_cachable_default;
+EXPORT_SYMBOL(_page_cachable_default);
+
+#define PM(p) __pgprot(_page_cachable_default | (p))
+
+static pgprot_t protection_map[16] __ro_after_init;
+DECLARE_VM_GET_PAGE_PROT
+
+static inline void setup_protection_map(void)
+{
+ protection_map[0] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ);
+ protection_map[1] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC);
+ protection_map[2] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ);
+ protection_map[3] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC);
+ protection_map[4] = PM(_PAGE_PRESENT);
+ protection_map[5] = PM(_PAGE_PRESENT);
+ protection_map[6] = PM(_PAGE_PRESENT);
+ protection_map[7] = PM(_PAGE_PRESENT);
+
+ protection_map[8] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ);
+ protection_map[9] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC);
+ protection_map[10] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE |
+ _PAGE_NO_READ);
+ protection_map[11] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE);
+ protection_map[12] = PM(_PAGE_PRESENT);
+ protection_map[13] = PM(_PAGE_PRESENT);
+ protection_map[14] = PM(_PAGE_PRESENT | _PAGE_WRITE);
+ protection_map[15] = PM(_PAGE_PRESENT | _PAGE_WRITE);
+}
+
+#undef PM
+
+void cpu_cache_init(void)
+{
+ if (IS_ENABLED(CONFIG_CPU_R3000) && cpu_has_3k_cache)
+ r3k_cache_init();
+ if ((IS_ENABLED(CONFIG_CPU_R4K_CACHE_TLB) ||
+ IS_ENABLED(CONFIG_CPU_SB1)) && cpu_has_4k_cache)
+ r4k_cache_init();
+
+ if (IS_ENABLED(CONFIG_CPU_CAVIUM_OCTEON) && cpu_has_octeon_cache)
+ octeon_cache_init();
+
+ setup_protection_map();
+}