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#ifndef APOS_MEM_H
#define APOS_MEM_H
/**
* @file mem.h
* Generic memory, common to both physical and virtual memory.
*/
#include <apos/utils.h>
#include <apos/types.h>
#define MM_OINFO_WIDTH (sizeof(mm_info_t) * 8)
#define pnum_to_index(pnum, order) \
(((pnum) >> __o_offset(order)) & (__o_width(order) - 1))
#define pm_to_index(paddr, \
order) (pnum_to_index(pm_to_pnum(paddr), (order)))
#define pm_to_pnum(paddr) ((paddr) >> __mm_page_shift)
#define pnum_to_paddr(pnum) ((pnum) << __mm_page_shift)
#define move_forward(var, num) (((var) += (num)) - (num))
#define move_paddr(paddr, base, offset) ((((pm_t)(paddr)) - (base)) + (offset))
#define num_elems(num) (((num) + MM_OINFO_WIDTH - 1) / \
MM_OINFO_WIDTH)
#define num_indexes(num) ((num) / MM_OINFO_WIDTH)
#define index_elems(num) ((num) / MM_OINFO_WIDTH)
#define state_elems(num) (sizeof(mm_info_t) * (num_elems(num)))
#define next_elems(num) (sizeof(void *) * (num))
#define max_index(order) (__o_width(order) - 1)
#define __o_offset(order) (__mm_shifts[order])
#define __o_width(order) (__mm_widths[order])
#define __o_size(order) (__mm_sizes[order])
#define __o_elems(order) (__mm_widths[order] / MM_OINFO_WIDTH)
#define __o_container(idx) ((idx) / MM_OINFO_WIDTH)
#define __o_bit(idx) ((idx) & (MM_OINFO_WIDTH - 1))
#define __va(x) (void *)(((uintptr_t)(x)) + VM_DMAP - \
RAM_BASE)
#define __pa(x) (void *)(((uintptr_t)(x)) - VM_DMAP + \
RAM_BASE)
#define __page(x) ((x) / BASE_PAGE_SIZE)
#define __addr(x) ((x)*BASE_PAGE_SIZE)
#define __pages(x) \
(is_aligned((x), BASE_PAGE_SIZE) ? __page((x)) : \
__page((x) + BASE_PAGE_SIZE))
#define __bytes(x) (__addr(x))
/** Memory region is used. */
#define MR_USED (1 << 8)
/** Memory region is shared. */
#define MR_SHARED (1 << 9)
/** Owner of shared region. */
#define MR_OWNED (1 << 10)
/** Copy on write. */
#define MR_COW (1 << 11)
/** Don't free memory on flush. */
#define MR_KEEP (1 << 12)
extern size_t __mm_shifts[10];
extern size_t __mm_widths[10];
extern size_t __mm_sizes[10];
extern size_t __mm_page_shift;
extern size_t __mm_max_order;
#define NUM_ORDERS 10
enum mm_order {
MM_O0,
MM_O1,
MM_O2,
MM_O3,
MM_O4,
MM_O5,
MM_O6,
MM_O7,
MM_O8,
MM_O9,
};
typedef ssize_t pnum_t;
void init_mem(size_t max_order, size_t shifts[10], size_t page_shift);
enum mm_mode get_mmode(void *fdt);
#define BASE_PAGE_SIZE (__o_size(BASE_PAGE))
#define BASE_PAGE (MM_O0)
#endif /* APOS_MEM_H */
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