Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 183 insertions, 0 deletions

diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
new file mode 100644
index 0000000000..7f9ff06401
--- /dev/null
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -0,0 +1,183 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Declarations of procedures and variables shared between files
+ * in arch/ppc/mm/.
+ *
+ *  Derived from arch/ppc/mm/init.c:
+ *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
+ *
+ *  Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
+ *  and Cort Dougan (PReP) (cort@cs.nmt.edu)
+ *    Copyright (C) 1996 Paul Mackerras
+ *
+ *  Derived from "arch/i386/mm/init.c"
+ *    Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
+ */
+#include <linux/mm.h>
+#include <asm/mmu.h>
+
+#ifdef CONFIG_PPC_MMU_NOHASH
+#include <asm/trace.h>
+
+/*
+ * On 40x and 8xx, we directly inline tlbia and tlbivax
+ */
+#if defined(CONFIG_40x) || defined(CONFIG_PPC_8xx)
+static inline void _tlbil_all(void)
+{
+	asm volatile ("sync; tlbia; isync" : : : "memory");
+	trace_tlbia(MMU_NO_CONTEXT);
+}
+static inline void _tlbil_pid(unsigned int pid)
+{
+	asm volatile ("sync; tlbia; isync" : : : "memory");
+	trace_tlbia(pid);
+}
+#define _tlbil_pid_noind(pid)	_tlbil_pid(pid)
+
+#else /* CONFIG_40x || CONFIG_PPC_8xx */
+extern void _tlbil_all(void);
+extern void _tlbil_pid(unsigned int pid);
+#ifdef CONFIG_PPC_BOOK3E_64
+extern void _tlbil_pid_noind(unsigned int pid);
+#else
+#define _tlbil_pid_noind(pid)	_tlbil_pid(pid)
+#endif
+#endif /* !(CONFIG_40x || CONFIG_PPC_8xx) */
+
+/*
+ * On 8xx, we directly inline tlbie, on others, it's extern
+ */
+#ifdef CONFIG_PPC_8xx
+static inline void _tlbil_va(unsigned long address, unsigned int pid,
+			     unsigned int tsize, unsigned int ind)
+{
+	asm volatile ("tlbie %0; sync" : : "r" (address) : "memory");
+	trace_tlbie(0, 0, address, pid, 0, 0, 0);
+}
+#elif defined(CONFIG_PPC_BOOK3E_64)
+extern void _tlbil_va(unsigned long address, unsigned int pid,
+		      unsigned int tsize, unsigned int ind);
+#else
+extern void __tlbil_va(unsigned long address, unsigned int pid);
+static inline void _tlbil_va(unsigned long address, unsigned int pid,
+			     unsigned int tsize, unsigned int ind)
+{
+	__tlbil_va(address, pid);
+}
+#endif /* CONFIG_PPC_8xx */
+
+#if defined(CONFIG_PPC_BOOK3E_64) || defined(CONFIG_PPC_47x)
+extern void _tlbivax_bcast(unsigned long address, unsigned int pid,
+			   unsigned int tsize, unsigned int ind);
+#else
+static inline void _tlbivax_bcast(unsigned long address, unsigned int pid,
+				   unsigned int tsize, unsigned int ind)
+{
+	BUG();
+}
+#endif
+
+static inline void print_system_hash_info(void) {}
+
+#else /* CONFIG_PPC_MMU_NOHASH */
+
+void print_system_hash_info(void);
+
+#endif /* CONFIG_PPC_MMU_NOHASH */
+
+#ifdef CONFIG_PPC32
+
+extern void mapin_ram(void);
+extern void setbat(int index, unsigned long virt, phys_addr_t phys,
+		   unsigned int size, pgprot_t prot);
+
+extern u8 early_hash[];
+
+#endif /* CONFIG_PPC32 */
+
+extern unsigned long __max_low_memory;
+extern phys_addr_t total_memory;
+extern phys_addr_t total_lowmem;
+extern phys_addr_t memstart_addr;
+extern phys_addr_t lowmem_end_addr;
+
+/* ...and now those things that may be slightly different between processor
+ * architectures.  -- Dan
+ */
+#ifdef CONFIG_PPC32
+extern void MMU_init_hw(void);
+void MMU_init_hw_patch(void);
+unsigned long mmu_mapin_ram(unsigned long base, unsigned long top);
+#endif
+void mmu_init_secondary(int cpu);
+
+#ifdef CONFIG_PPC_E500
+extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx,
+				     bool dryrun, bool init);
+#ifdef CONFIG_PPC32
+extern void adjust_total_lowmem(void);
+extern int switch_to_as1(void);
+extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu);
+void create_kaslr_tlb_entry(int entry, unsigned long virt, phys_addr_t phys);
+void reloc_kernel_entry(void *fdt, int addr);
+void relocate_init(u64 dt_ptr, phys_addr_t start);
+extern int is_second_reloc;
+#endif
+extern void loadcam_entry(unsigned int index);
+extern void loadcam_multi(int first_idx, int num, int tmp_idx);
+
+#ifdef CONFIG_RANDOMIZE_BASE
+void kaslr_early_init(void *dt_ptr, phys_addr_t size);
+void kaslr_late_init(void);
+#else
+static inline void kaslr_early_init(void *dt_ptr, phys_addr_t size) {}
+static inline void kaslr_late_init(void) {}
+#endif
+
+struct tlbcam {
+	u32	MAS0;
+	u32	MAS1;
+	unsigned long	MAS2;
+	u32	MAS3;
+	u32	MAS7;
+};
+
+#define NUM_TLBCAMS	64
+
+extern struct tlbcam TLBCAM[NUM_TLBCAMS];
+#endif
+
+#if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_PPC_85xx) || defined(CONFIG_PPC_8xx)
+/* 6xx have BATS */
+/* PPC_85xx have TLBCAM */
+/* 8xx have LTLB */
+phys_addr_t v_block_mapped(unsigned long va);
+unsigned long p_block_mapped(phys_addr_t pa);
+#else
+static inline phys_addr_t v_block_mapped(unsigned long va) { return 0; }
+static inline unsigned long p_block_mapped(phys_addr_t pa) { return 0; }
+#endif
+
+#if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_PPC_8xx) || defined(CONFIG_PPC_E500)
+void mmu_mark_initmem_nx(void);
+void mmu_mark_rodata_ro(void);
+#else
+static inline void mmu_mark_initmem_nx(void) { }
+static inline void mmu_mark_rodata_ro(void) { }
+#endif
+
+#ifdef CONFIG_PPC_8xx
+void __init mmu_mapin_immr(void);
+#endif
+
+#ifdef CONFIG_DEBUG_WX
+void ptdump_check_wx(void);
+#else
+static inline void ptdump_check_wx(void) { }
+#endif
+
+static inline bool debug_pagealloc_enabled_or_kfence(void)
+{
+	return IS_ENABLED(CONFIG_KFENCE) || debug_pagealloc_enabled();
+}