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/*
* Copyright 2008-2009 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>
#ifdef CONFIG_ADDR_MAP
#include <addr_map.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
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++) {
write_tlb(tlb_table[i].mas0,
tlb_table[i].mas1,
tlb_table[i].mas2,
tlb_table[i].mas3,
tlb_table[i].mas7);
}
return ;
}
void read_tlbcam_entry(int idx, u32 *valid, u32 *tsize, unsigned long *epn,
phys_addr_t *rpn)
{
u32 _mas1;
mtspr(MAS0, FSL_BOOKE_MAS0(1, idx, 0));
asm volatile("tlbre;isync");
_mas1 = mfspr(MAS1);
*valid = (_mas1 & MAS1_VALID);
*tsize = (_mas1 >> 8) & 0xf;
*epn = mfspr(MAS2) & MAS2_EPN;
*rpn = mfspr(MAS3) & MAS3_RPN;
#ifdef CONFIG_ENABLE_36BIT_PHYS
*rpn |= ((u64)mfspr(MAS7)) << 32;
#endif
}
#ifndef CONFIG_NAND_SPL
void print_tlbcam(void)
{
int i;
unsigned int num_cam = mfspr(SPRN_TLB1CFG) & 0xfff;
/* walk all the entries */
printf("TLBCAM entries\n");
for (i = 0; i < num_cam; i++) {
unsigned long epn;
u32 tsize, valid;
phys_addr_t rpn;
read_tlbcam_entry(i, &valid, &tsize, &epn, &rpn);
printf("entry %02d: V: %d EPN 0x%08x RPN 0x%08llx size:",
i, (valid == 0) ? 0 : 1, (unsigned int)epn,
(unsigned long long)rpn);
print_size(TSIZE_TO_BYTES(tsize), "\n");
}
}
static inline void use_tlb_cam(u8 idx)
{
int i = idx / 32;
int bit = idx % 32;
gd->used_tlb_cams[i] |= (1 << bit);
}
static inline void free_tlb_cam(u8 idx)
{
int i = idx / 32;
int bit = idx % 32;
gd->used_tlb_cams[i] &= ~(1 << bit);
}
void init_used_tlb_cams(void)
{
int i;
unsigned int num_cam = mfspr(SPRN_TLB1CFG) & 0xfff;
for (i = 0; i < ((CONFIG_SYS_NUM_TLBCAMS+31)/32); i++)
gd->used_tlb_cams[i] = 0;
/* walk all the entries */
for (i = 0; i < num_cam; i++) {
mtspr(MAS0, FSL_BOOKE_MAS0(1, i, 0));
asm volatile("tlbre;isync");
if (mfspr(MAS1) & MAS1_VALID)
use_tlb_cam(i);
}
}
int find_free_tlbcam(void)
{
int i;
u32 idx;
for (i = 0; i < ((CONFIG_SYS_NUM_TLBCAMS+31)/32); i++) {
idx = ffz(gd->used_tlb_cams[i]);
if (idx != 32)
break;
}
idx += i * 32;
if (idx >= CONFIG_SYS_NUM_TLBCAMS)
return -1;
return idx;
}
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;
if (tlb == 1)
use_tlb_cam(esel);
_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 = FSL_BOOKE_MAS7(rpn);
write_tlb(_mas0, _mas1, _mas2, _mas3, _mas7);
#ifdef CONFIG_ADDR_MAP
if ((tlb == 1) && (gd->flags & GD_FLG_RELOC))
addrmap_set_entry(epn, rpn, TSIZE_TO_BYTES(tsize), esel);
#endif
}
void disable_tlb(u8 esel)
{
u32 _mas0, _mas1, _mas2, _mas3, _mas7;
free_tlb_cam(esel);
_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");
#ifdef CONFIG_ADDR_MAP
if (gd->flags & GD_FLG_RELOC)
addrmap_set_entry(0, 0, 0, esel);
#endif
}
static void tlbsx (const volatile unsigned *addr)
{
__asm__ __volatile__ ("tlbsx 0,%0" : : "r" (addr), "m" (*addr));
}
/* return -1 if we didn't find anything */
int find_tlb_idx(void *addr, u8 tlbsel)
{
u32 _mas0, _mas1;
/* zero out Search PID, AS */
mtspr(MAS6, 0);
tlbsx(addr);
_mas0 = mfspr(MAS0);
_mas1 = mfspr(MAS1);
/* we found something, and its in the TLB we expect */
if ((MAS1_VALID & _mas1) &&
(MAS0_TLBSEL(tlbsel) == (_mas0 & MAS0_TLBSEL_MSK))) {
return ((_mas0 & MAS0_ESEL_MSK) >> 16);
}
return -1;
}
#ifdef CONFIG_ADDR_MAP
void init_addr_map(void)
{
int i;
unsigned int num_cam = mfspr(SPRN_TLB1CFG) & 0xfff;
/* walk all the entries */
for (i = 0; i < num_cam; i++) {
unsigned long epn;
u32 tsize, valid;
phys_addr_t rpn;
read_tlbcam_entry(i, &valid, &tsize, &epn, &rpn);
if (valid & MAS1_VALID)
addrmap_set_entry(epn, rpn, TSIZE_TO_BYTES(tsize), i);
}
return ;
}
#endif
unsigned int
setup_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg)
{
int i;
unsigned int tlb_size;
unsigned int ram_tlb_address = (unsigned int)CONFIG_SYS_DDR_SDRAM_BASE;
unsigned int max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xf;
u64 size, memsize = (u64)memsize_in_meg << 20;
size = min(memsize, CONFIG_MAX_MEM_MAPPED);
/* Convert (4^max) kB to (2^max) bytes */
max_cam = max_cam * 2 + 10;
for (i = 0; size && i < 8; i++) {
int ram_tlb_index = find_free_tlbcam();
u32 camsize = __ilog2_u64(size) & ~1U;
u32 align = __ilog2(ram_tlb_address) & ~1U;
if (ram_tlb_index == -1)
break;
if (align == -2) align = max_cam;
if (camsize > align)
camsize = align;
if (camsize > max_cam)
camsize = max_cam;
tlb_size = (camsize - 10) / 2;
set_tlb(1, ram_tlb_address, p_addr,
MAS3_SX|MAS3_SW|MAS3_SR, 0,
0, ram_tlb_index, tlb_size, 1);
size -= 1ULL << camsize;
memsize -= 1ULL << camsize;
ram_tlb_address += 1UL << camsize;
p_addr += 1UL << camsize;
}
if (memsize)
print_size(memsize, " left unmapped\n");
return memsize_in_meg;
}
unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg)
{
return
setup_ddr_tlbs_phys(CONFIG_SYS_DDR_SDRAM_BASE, memsize_in_meg);
}
#endif /* !CONFIG_NAND_SPL */
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