space.c File Reference

Memory management in SPARC. More...

#include <types.h>
#include <errno.h>
#include <libc.h>
#include <bsp.h>
#include <core/sched.h>
#include <arch.h>
#include "thread.h"
#include "space.h"
#include "sparc_conf.h"
#include "context_offset.h"
#include "ioports.h"

Go to the source code of this file.

Data Structures
struct	pok_space

Macros
#define	KERNEL_STACK_SIZE   8192

Functions
ptd mmu_contexts_tab[POK_CONFIG_NB_PARTITIONS]	__attribute__ ((aligned(POK_CONFIG_NB_PARTITIONS *sizeof(ptd))))
ptd mmu_level1_tab[POK_CONFIG_NB_PARTITIONS][MM_LVL1_ENTRIES_NBR]	__attribute__ ((aligned(MM_LVL1_ENTRIES_NBR *sizeof(ptd))))
pte mmu_level2_tab[POK_CONFIG_NB_PARTITIONS][MM_LVL2_ENTRIES_NBR]	__attribute__ ((aligned(MM_LVL2_ENTRIES_NBR *sizeof(pte))))
pok_ret_t	pok_create_space (uint8_t partition_id, uint32_t addr, uint32_t size)
pok_ret_t	pok_space_switch (uint8_t old_partition_id, uint8_t new_partition_id)
uint32_t	pok_space_base_vaddr (uint32_t addr)
uint32_t	pok_space_context_create (uint8_t id, uint32_t entry_rel, uint32_t stack_rel, uint32_t arg1, uint32_t arg2)
void	pok_arch_space_init (void)

Variables
struct pok_space	spaces [POK_CONFIG_NB_PARTITIONS]

---

Detailed Description

Memory management in SPARC.

Author:

Fabien Chouteau

Definition in file space.c.

---

Macro Definition Documentation

#define KERNEL_STACK_SIZE   8192

Definition at line 36 of file space.c.

---

Function Documentation

ptd mmu_contexts_tab [POK_CONFIG_NB_PARTITIONS] __attribute__

(

(aligned(POK_CONFIG_NB_PARTITIONS *sizeof(ptd)))

)

MMU contexts table. (cf SPARC V8 Manual, page 243)

ptd mmu_level1_tab [POK_CONFIG_NB_PARTITIONS][MM_LVL1_ENTRIES_NBR] __attribute__

(

(aligned(MM_LVL1_ENTRIES_NBR *sizeof(ptd)))

)

MMU level 1 table. (cf SPARC V8 Manual, page 243)

pte mmu_level2_tab [POK_CONFIG_NB_PARTITIONS][MM_LVL2_ENTRIES_NBR] __attribute__

(

(aligned(MM_LVL2_ENTRIES_NBR *sizeof(pte)))

)

MMU level 2 table. (cf SPARC V8 Manual, page 243)

void pok_arch_space_init

(

void

)

Initilize MMU tables.

Definition at line 159 of file space.c.

{
  int i = 0;
  int j = 0;

  for (i = 0; i < POK_CONFIG_NB_PARTITIONS; i++)
    mmu_contexts_tab[i] = MM_ET_INVALID;

  for (i = 0; i < POK_CONFIG_NB_PARTITIONS; i++)
  {
    mmu_contexts_tab[i] = (unsigned int)&(mmu_level1_tab[i]) >> 4 | MM_ET_PTD;

    for (j = 0; j < MM_LVL1_ENTRIES_NBR; j++)
    {
      mmu_level1_tab[i][j] = MM_ET_INVALID;
    }

    for (j = 0; j < MM_LVL2_ENTRIES_NBR; j++)
    {
      mmu_level2_tab[i][j] = MM_ET_INVALID;
    }
  }

  unsigned int kernel_pte = mm_index1(SPARC_RAM_ADDR);

  /* the kernel code is always mapped on a 16Mb page (including all partitions) */
  for (i = 0; i < POK_CONFIG_NB_PARTITIONS; i++)
  {
    mmu_level1_tab[i][kernel_pte] = (SPARC_RAM_ADDR >> 4) | MM_ACC_S_RWE | MM_ET_PTE | MM_CACHEABLE;
  }


  /* set context table */
  asm volatile ("sta %0, [%1] %2;\n"
                : /* no output */
                : "r" (((unsigned int) mmu_contexts_tab) >> 4), "r" (MMU_CTXTBL_PTR), "i" (ASI_M_MMUREGS)
                : "memory");

  /* set context number */
  pok_space_switch(0, 0);

  asm volatile ("flush\n"
                "sta %0, [%1] %2;\n"
                : /* no output */
                : "r" (0x1), "r" (MMU_CTRL_REG), "i" (ASI_M_MMUREGS)
                : "memory");


#ifdef POK_NEEDS_DEBUG
    printf ("pok_arch_space_init: ctx nbr=%u\n", POK_CONFIG_NB_PARTITIONS);
#endif
}

pok_ret_t pok_create_space	(	uint8_t	partition_id,
		uint32_t	addr,
		uint32_t	size
	)

Set ptd and pte for the given partition.

Definition at line 70 of file space.c.

{
  if (size > SPARC_PARTITION_SIZE)
  {
#ifdef POK_NEEDS_DEBUG
    printf ("pok_create_space: %d: partition size too big 0x%x\n", partition_id, size);
#endif
    return (POK_ERRNO_SIZE);
  }

  if ((addr & (SPARC_PAGE_SIZE - 1)) != 0)
  {
#ifdef POK_NEEDS_DEBUG
    printf ("pok_create_space: %d: partition address not aligned 0x%x\n", partition_id, addr);
#endif
    return (POK_ERRNO_EFAULT);
  }
#ifdef POK_NEEDS_DEBUG
  printf ("pok_create_space: %d: %x %x\n", partition_id, addr, size);
#endif
  spaces[partition_id].phys_base = addr;
  spaces[partition_id].size = size;

  unsigned int as_ptd = mm_index1(SPARC_PARTITION_BASE_VADDR);
  unsigned int as_pte = mm_index2(SPARC_PARTITION_BASE_VADDR);

  mmu_level1_tab[partition_id][as_ptd] = ((unsigned int) &(mmu_level2_tab[partition_id]) >> 4) | MM_ET_PTD;
  /* partition as */
  mmu_level2_tab[partition_id][as_pte] = ((addr) >> 4) | MM_ACC_RWE | MM_ET_PTE | MM_CACHEABLE;

  return (POK_ERRNO_OK);
}

uint32_t pok_space_base_vaddr

(

uint32_t

addr

)

Returns:

partition virtual base adress.

See also:

SPARC_PARTITION_BASE_VADDR

Definition at line 125 of file space.c.

{
   (void) addr;
   return (SPARC_PARTITION_BASE_VADDR);
}

uint32_t pok_space_context_create	(	uint8_t	id,
		uint32_t	entry_rel,
		uint32_t	stack_rel,
		uint32_t	arg1,
		uint32_t	arg2
	)

Initilize thread stack.

Definition at line 134 of file space.c.

{
  uint32_t ctx = spaces[id].phys_base + stack_rel - 0x40;

  outw(ctx - RESTORE_CNT_OFFSET, 1); /* Only 1 register window needed */
  outw(ctx - PC_OFFSET, entry_rel);
  outw(ctx - NPC_OFFSET, entry_rel + 4);
  outw(ctx - I0_OFFSET, arg1);
  outw(ctx - I1_OFFSET, arg2);

#ifdef POK_NEEDS_DEBUG
  printf ("space_context_create part_id=%d entry=%x stack=%x arg1=%x arg2=%x\n",
          id, entry_rel, stack_rel, arg1, arg2);
#endif

  return SPARC_PARTITION_BASE_VADDR + stack_rel - 0x40;
}

pok_ret_t pok_space_switch	(	uint8_t	old_partition_id,
		uint8_t	new_partition_id
	)

Switch adress space in MMU (context register).

Definition at line 108 of file space.c.

{
  (void) old_partition_id;

  asm volatile ("flush\n"
                "sta %0, [%1] %2;\n"
                : /* no output */
                : "r" (new_partition_id), "r" (MMU_CTX_REG), "i" (ASI_M_MMUREGS)
                : "memory");
  return (POK_ERRNO_OK);
}

---

Variable Documentation

struct pok_space spaces[POK_CONFIG_NB_PARTITIONS]

Definition at line 47 of file space.c.