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#ifndef _I386_PGALLOC_H
#define _I386_PGALLOC_H
#include <xeno/config.h>
#include <xeno/sched.h>
#include <asm/processor.h>
#include <asm/fixmap.h>
#define pgd_quicklist (current_cpu_data.pgd_quick)
#define pmd_quicklist (current_cpu_data.pmd_quick)
#define pte_quicklist (current_cpu_data.pte_quick)
#define pgtable_cache_size (current_cpu_data.pgtable_cache_sz)
/*
* Allocate and free page tables.
*/
#define pte_free(pte) pte_free_fast(pte)
#define pgd_alloc(mm) get_pgd_fast()
#define pgd_free(pgd) free_pgd_fast(pgd)
/*
* allocating and freeing a pmd is trivial: the 1-entry pmd is
* inside the pgd, so has no extra memory associated with it.
* (In the PAE case we free the pmds as part of the pgd.)
*/
#define pmd_alloc_one_fast(mm, addr) ({ BUG(); ((pmd_t *)1); })
#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
#define pmd_free_slow(x) do { } while (0)
#define pmd_free_fast(x) do { } while (0)
#define pmd_free(x) do { } while (0)
#define pgd_populate(mm, pmd, pte) BUG()
/*
* TLB flushing:
*
* - flush_tlb() flushes the current mm struct TLBs
* - flush_tlb_all() flushes all processes TLBs
* - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
*
* ..but the i386 has somewhat limited tlb flushing capabilities,
* and page-granular flushes are available only on i486 and up.
*/
#ifndef CONFIG_SMP
#define flush_tlb() __flush_tlb()
#define flush_tlb_all() __flush_tlb()
#define flush_tlb_all_pge() __flush_tlb_pge()
#define local_flush_tlb() __flush_tlb()
#define flush_tlb_cpu(_cpu) __flush_tlb()
#define flush_tlb_mask(_mask) __flush_tlb()
#else
#include <xeno/smp.h>
extern void flush_tlb_mask(unsigned long mask);
extern void flush_tlb_all_pge(void);
#define flush_tlb() __flush_tlb()
#define flush_tlb_all() flush_tlb_mask((1 << smp_num_cpus) - 1)
#define local_flush_tlb() __flush_tlb()
#define flush_tlb_cpu(_cpu) flush_tlb_mask(1 << (_cpu))
#endif
static inline void flush_tlb_pgtables(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
/* i386 does not keep any page table caches in TLB */
}
#endif /* _I386_PGALLOC_H */
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