#include "../../context.h"
#interface "vm.h"

// ----
// typedef struct vm_impl<Impl, Isa> impl vm{
//     union Data* vm_impl;
//     uint i;
//     pte_t* pte;
//     uint sz;
//  
//     __code loaduvm_ptesize_check(Type* vm_impl, __code next(...));
//     __code loaduvm_loop(Type* vm_impl, uint i, pte_t* pte, uint sz, __code next(...));
//     __code next(...);
//  
// 
// } vm_impl;
// ----

vm* createvm_impl(struct Context* cbc_context) {
    struct vm* vm  = new vm();
    struct vm_impl* vm_impl = new vm_impl();
    vm->vm = (union Data*)vm_impl;
    vm_impl->vm_impl = NULL;
    vm_impl->i  = 0;
    vm_impl->pte = NULL;
    vm_impl->sz  = 0;
    vm_impl->loaduvm_ptesize_check = C_loaduvm_ptesize_checkvm_impl;
    vm_impl->loaduvm_loop = C_loaduvm_loopvm_impl;
    vm_impl->allocuvm_check_newsz = C_allocuvm_check_newszvm_impl;
    vm_impl->allocuvm_loop = C_allocuvm_loopvm_impl;
    vm->init_vmm = C_init_vmmvm_impl;
    vm->kpt_freerange = C_kpt_freerangevm_impl;
    vm->kpt_alloc = C_kpt_allocvm_impl;
    vm->switchuvm = C_switchuvmvm_impl;
    vm->init_inituvm = C_init_inituvmvm_impl;
    vm->loaduvm = C_loaduvmvm_impl;
    vm->allocuvm = C_allocuvmvm_impl;
    vm->clearpteu = C_clearpteuvm_impl;
    vm->copyuvm = C_copyuvmvm_impl;
    vm->uva2ka = C_uva2kavm_impl;
    vm->copyout = C_copyoutvm_impl;
    vm->pagind_int = C_pagind_intvm_impl;
    return vm;
}

extern struct {
    struct spinlock lock;
    struct run *freelist;
} kpt_mem;

__code init_vmmvm_impl(struct vm_impl* vm, __code next(...)) {
    initlock(&kpt_mem.lock, "vm");
    kpt_mem.freelist = NULL;
    
    goto next(...);
}

extern struct run {
    struct run *next;
};

static void _kpt_free (char *v)
{
    struct run *r;

    r = (struct run*) v;
    r->next = kpt_mem.freelist;
    kpt_mem.freelist = r;
}

__code kpt_freerangevm_impl(struct vm_impl* vm, uint low, uint hi, __code next(...)) { 
 
   if (low < hi) { 
     _kpt_free((char*)low);
     goto kpt_freerangevm_impl(vm, low + PT_SZ, hi, next(...));  
  
   } 
  goto next(...);
}
__code kpt_allocvm_impl(struct vm_impl* vm, __code next(...)) {
  acquire(&kpt_mem.lock);

  goto kpt_alloc_check_impl(vm_impl, next(...));

  goto next(...);
}

typedef struct proc proc;
__code switchuvmvm_impl(struct vm_impl* vm , struct proc* p, __code next(...)) { //:skip

    goto next(...);
}

__code init_inituvmvm_impl(struct vm_impl* vm, pde_t* pgdir, char* init, uint sz, __code next(...)) { //:skip

    goto next(...);
}

__code loaduvmvm_impl(struct vm_impl* vm, pde_t* pgdir, char* addr, struct inode* ip, uint offset, uint sz,  __code next(...)) {
    vm->pgdir = pgdir;
    vm->addr = addr;
    vm->ip = ip;
    vm->offset = offset;
    vm->sz = sz;
    
    goto loaduvm_ptesize_checkvm_impl(vm, next);
}

__code allocuvmvm_impl(struct vm_impl* vm, pde_t* pgdir, uint oldsz, uint newsz, __code next(...)) {

    goto allocuvm_check_newszvm_impl(vm, pgdir, oldsz, newsz, next(...));
}

__code clearpteuvm_impl(struct vm_impl* vm, pde_t* pgdir, char* uva,  __code next(...)) {

    goto clearpteu_check_ptevm_impl(vm, pgdir, uva, next(...);
}

__code copyuvmvm_impl(struct vm_impl* vm, pde_t* pgdir, uint sz, __code next(...)) {

    goto next(...);
}

__code uva2kavm_impl(struct vm_impl* vm, pde_t* pgdir, char* uva, __code next(...)) {

    goto next(...);
}

__code copyoutvm_impl(struct vm_impl* vm, pde_t* pgdir, uint va, void* pp, uint len, __code next(...)) {

    goto next(...);
}

__code pagind_intvm_impl(struct vm_impl* vm, uint phy_low, uint phy_hi, __code next(...)) {

    goto next(...);
}