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/* 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)
int mmu_mark_initmem_nx(void);
int mmu_mark_rodata_ro(void);
#else
static inline int mmu_mark_initmem_nx(void) { return 0; }
static inline int mmu_mark_rodata_ro(void) { return 0; }
#endif
#ifdef CONFIG_PPC_8xx
void __init mmu_mapin_immr(void);
#endif
static inline bool debug_pagealloc_enabled_or_kfence(void)
{
return IS_ENABLED(CONFIG_KFENCE) || debug_pagealloc_enabled();
}
#ifdef CONFIG_MEMORY_HOTPLUG
int create_section_mapping(unsigned long start, unsigned long end,
int nid, pgprot_t prot);
#endif
int hash__kernel_map_pages(struct page *page, int numpages, int enable);
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