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/*
* Copyright 2008 Freescale Semiconductor, Inc.
*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/processor.h>
#include <asm/mmu.h>
void set_tlb(u8 tlb, u32 epn, u64 rpn,
u8 perms, u8 wimge,
u8 ts, u8 esel, u8 tsize, u8 iprot)
{
u32 _mas0, _mas1, _mas2, _mas3, _mas7;
_mas0 = FSL_BOOKE_MAS0(tlb, esel, 0);
_mas1 = FSL_BOOKE_MAS1(1, iprot, 0, ts, tsize);
_mas2 = FSL_BOOKE_MAS2(epn, wimge);
_mas3 = FSL_BOOKE_MAS3(rpn, 0, perms);
_mas7 = rpn >> 32;
mtspr(MAS0, _mas0);
mtspr(MAS1, _mas1);
mtspr(MAS2, _mas2);
mtspr(MAS3, _mas3);
#ifdef CONFIG_ENABLE_36BIT_PHYS
mtspr(MAS7, _mas7);
#endif
asm volatile("isync;msync;tlbwe;isync");
}
void disable_tlb(u8 esel)
{
u32 _mas0, _mas1, _mas2, _mas3, _mas7;
_mas0 = FSL_BOOKE_MAS0(1, esel, 0);
_mas1 = 0;
_mas2 = 0;
_mas3 = 0;
_mas7 = 0;
mtspr(MAS0, _mas0);
mtspr(MAS1, _mas1);
mtspr(MAS2, _mas2);
mtspr(MAS3, _mas3);
#ifdef CONFIG_ENABLE_36BIT_PHYS
mtspr(MAS7, _mas7);
#endif
asm volatile("isync;msync;tlbwe;isync");
}
void invalidate_tlb(u8 tlb)
{
if (tlb == 0)
mtspr(MMUCSR0, 0x4);
if (tlb == 1)
mtspr(MMUCSR0, 0x2);
}
void init_tlbs(void)
{
int i;
for (i = 0; i < num_tlb_entries; i++) {
set_tlb(tlb_table[i].tlb, tlb_table[i].epn, tlb_table[i].rpn,
tlb_table[i].perms, tlb_table[i].wimge,
tlb_table[i].ts, tlb_table[i].esel, tlb_table[i].tsize,
tlb_table[i].iprot);
}
return ;
}
unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg)
{
unsigned int tlb_size;
unsigned int ram_tlb_index;
unsigned int ram_tlb_address;
/*
* Determine size of each TLB1 entry.
*/
switch (memsize_in_meg) {
case 16:
case 32:
tlb_size = BOOKE_PAGESZ_16M;
break;
case 64:
case 128:
tlb_size = BOOKE_PAGESZ_64M;
break;
case 256:
case 512:
tlb_size = BOOKE_PAGESZ_256M;
break;
case 1024:
case 2048:
if (PVR_VER(get_pvr()) > PVR_VER(PVR_85xx))
tlb_size = BOOKE_PAGESZ_1G;
else
tlb_size = BOOKE_PAGESZ_256M;
break;
default:
puts("DDR: only 16M, 32M, 64M, 128M, 256M, 512M, 1G"
" and 2G are supported.\n");
/*
* The memory was not able to be mapped.
* Default to a small size.
*/
tlb_size = BOOKE_PAGESZ_64M;
memsize_in_meg = 64;
break;
}
/*
* Configure DDR TLB1 entries.
* Starting at TLB1 8, use no more than 8 TLB1 entries.
*/
ram_tlb_index = 8;
ram_tlb_address = (unsigned int)CFG_DDR_SDRAM_BASE;
while (ram_tlb_address < (memsize_in_meg * 1024 * 1024)
&& ram_tlb_index < 16) {
set_tlb(1, ram_tlb_address, ram_tlb_address,
MAS3_SX|MAS3_SW|MAS3_SR, 0,
0, ram_tlb_index, tlb_size, 1);
ram_tlb_address += (0x1000 << ((tlb_size - 1) * 2));
ram_tlb_index++;
}
/*
* Confirm that the requested amount of memory was mapped.
*/
return memsize_in_meg;
}
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