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/**************************************************************
*
* Creation Date: <1998-11-11 13:55:49 samuel>
* Time-stamp: <2001/06/28 01:03:04 samuel>
*
* <mmu.h>
*
* MMU-emulation
*
* Copyright (C) 1998, 1999, 2000, 2001 Samuel Rydh
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation;
*
**************************************************************/
#ifndef _H_MMU
#define _H_MMU
#ifndef __ASSEMBLY__
#include "kernel_vars.h"
#include "mac_registers.h"
#include "mmu_mappings.h"
#endif
#define IO_PAGE_MAGIC_1 0x10BACA57
#define IO_PAGE_MAGIC_2 0x135AB779
/* Splitmode states */
#define kSplitAlgorithmFast 1 /* Using fastest splitmode algorithm */
#define kSplitAlgorithmFastSS 2 /* Currently singlestepping */
#define kSplitAlgorithm601 4 /* Using 601-compatible algorithm */
#ifndef __ASSEMBLY__
/* this structure *must* fit into a single page (4096) bytes */
typedef struct io_page
{
ulong magic; /* identifier 1 */
ulong magic2; /* identifier 2 */
ulong me_phys; /* physical address of this block */
ulong mphys; /* mac-physical address of block */
struct io_page *next; /* next io_page */
void *usr_data[512]; /* usr data (grain=double word) */
} io_page_t;
/* Kernel exports */
extern PTE *Hash;
extern unsigned long Hash_mask;
/* from mmu */
extern int init_mmu( kernel_vars_t *kv );
extern void cleanup_mmu( kernel_vars_t *kv );
extern void clear_tlb_table( kernel_vars_t *kv );
extern void do_tlbia( kernel_vars_t *kv );
extern void do_flush( ulong vsid, ulong va, ulong *ptep );
extern void mmu_add_map( kernel_vars_t *kv, struct mmu_mapping *m );
extern void mmu_remove_map( kernel_vars_t *kv, struct mmu_mapping *m );
extern void mmu_altered( kernel_vars_t *kv );
/* from mmu_vsid */
extern int init_vsid_table( kernel_vars_t *kv );
extern void cleanup_vsid_table( kernel_vars_t *kv );
extern void vsid_lookup( kernel_vars_t *kv, ulong mac_vsid, ulong *usr_ret, ulong *sv_ret );
extern void flush_vsid_table( kernel_vars_t *kv );
extern void clear_vsids( kernel_vars_t *kv, int is_init );
/* from mmu_lvhash */
extern int init_lvhash( kernel_vars_t *kv );
extern void cleanup_lvhash( kernel_vars_t *kv );
extern void hash_lv_to_pte( kernel_vars_t *kv, ulong *ea, ulong *pte );
extern void unmap_lv_range( kernel_vars_t *kv, ulong lv, size_t size );
/* from tlbie.c */
extern int init_tlbie( kernel_vars_t *kv );
extern void cleanup_tlbie( kernel_vars_t *kv );
extern void table_tlbie( kernel_vars_t *kv, ulong ea );
extern void table_tlbia( kernel_vars_t *kv );
extern void hash_ea_to_pte( kernel_vars_t *kv, ulong ea, ulong *pte );
extern void unmap_ea_range( kernel_vars_t *kv, ulong ea, size_t size );
/* from mmu_io.c */
#define TRANSL_RO 1 /* read only memory (ROM etc) */
#define TRANSL_PHYSICAL 2 /* physical (ROM etc) */
#define TRANSL_VALID 4 /* valid bit */
#define TRANSL_IO 8 /* I/O translation */
#define TRANSL_SCRATCH 16 /* (block transl) scratch area */
#define TRANSL_FORCE_CACHE 32 /* force write-through caching */
#define TRANSL_FB_ACCEL 64 /* offscreen framebuffer, track changes */
#define TRANSL_FB 128 /* framebuffer (ea assumed to be constant) */
#define TRANSL_DBAT 256 /* allow use of a DBAT register */
#define TRANSL_MACOS_CONTROLS_CACHE 512 /* do not force WIM bits to 001 */
extern int init_mmu_io( kernel_vars_t *kv );
extern void cleanup_mmu_io( kernel_vars_t *kv );
extern int add_block_trans( kernel_vars_t *kv, ulong mbase, char *lvbase, ulong size, int flags );
extern void remove_block_trans( kernel_vars_t *kv, int id );
extern int add_io_trans( kernel_vars_t *kv, ulong mbase, int size, void *usr_data );
extern int remove_io_trans( kernel_vars_t *kv, ulong mbase, int size );
extern int mphys_to_pte( kernel_vars_t *kv, ulong mphys, PTE *pte, int is_write );
/* from mmu_fb.c */
extern int init_mmu_fb( kernel_vars_t *kv );
extern void cleanup_mmu_fb( kernel_vars_t *kv );
extern void video_pte_inserted( kernel_vars_t *kv, char *lvptr, ulong *pte_slot, ulong word1, ulong ea );
extern void setup_fb_acceleration( kernel_vars_t *kv, char *lvbase, int bytes_per_row, int height );
extern int get_dirty_fb_lines( kernel_vars_t *kv, short *retbuf, int num_bytes );
/* from mmu_tracker.c */
extern int init_mmu_tracker( kernel_vars_t *kv );
extern void cleanup_mmu_tracker( kernel_vars_t *kv );
extern int track_lvrange( kernel_vars_t *kv, char *lvbase, size_t size );
extern size_t get_track_buffer( kernel_vars_t *kv, char *retbuf );
extern void set_track_buffer( kernel_vars_t *kv, char *buf );
extern void lvpage_dirty( kernel_vars_t *kv, char *lvpage );
/* These functions should be used by the debugger only */
struct linux_page;
extern int get_PTE( kernel_vars_t *kv, int context, ulong va, PTE *ret );
extern int dbg_get_linux_page( ulong va, struct linux_page *r );
extern int dbg_translate_ea( kernel_vars_t *kv, int context, ulong va, PTE *retpte, int data_access );
/* No longer defined in the kernel header files... */
typedef struct {
unsigned long t:1; /* Normal or I/O type */
unsigned long ks:1; /* Supervisor 'key' (normally 0) */
unsigned long kp:1; /* User 'key' (normally 1) */
unsigned long n:1; /* No-execute */
unsigned long :4; /* Unused */
unsigned long vsid:24; /* Virtual Segment Identifier */
} SEGREG_MOL;
/************************************************************************/
/* Linux context allocation */
/************************************************************************/
extern int setup_mol_contexts( void );
extern void release_mol_contexts( void );
extern int flush_all_PTEs( void );
/* Number of linux-context to allocate for mol (64 is the ABSOLUTE MINIMUM) */
#define NUM_MOL_CONTEXTS 65536 /* more than we will need (ever) */
/*
* The new MM implementation uses VSID
*
* VSID = (((context * 897) << 4) + ((va>>28) * 0x111)) & 0xffffff
*
* Only context 0..32767 are used. We can use context 32768..0xfffff.
* The old MM implementation used
*
* VSID = (((context * 897) << 4) + (va>>28)) & 0xffffff
*/
#define VSID_MASK 0xffffff
#define CTX_MASK 0xfffff
#define FIRST_MOL_CONTEXT (CTX_MASK - NUM_MOL_CONTEXTS)
#define LAST_MOL_CONTEXT (FIRST_MOL_CONTEXT + NUM_MOL_CONTEXTS - 1)
#define MUNGE_ADD_NEXT 897
#define MUNGE_MUL_INVERSE 2899073 // Multiplicative inverse of 897 (modulo VSID_MASK)
#ifdef NEW_LINUX_MM
#define MUNGE_ESID_ADD 0x111
#define DETECT_LCTX_OVERFLOW()
#define MUNGE_CONTEXT(c) (((c) * 897) & CTX_MASK)
#else /* NEW_LINUX_MM */
#define LAST_LINUX_CONTEXT (LAST_MOL_CONTEXT - NUM_MOL_CONTEXTS - 16000 /* safety gap */)
#define MUNGE_ESID_ADD 1
extern void linux_context_overflow( void );
#define DETECT_LCTX_OVERFLOW() \
{ if( atomic_read(mc_next_mmu_context) > LAST_LINUX_CONTEXT ) \
linux_context_overflow(); }
#endif /* NEW_LINUX_MM */
#endif /* __ASSEMBLY__ */
#endif /* _H_MMU */
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