mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-31 14:28:52 +09:00
![Kumar Gala](/assets/img/avatar_default.png)
Fix: tlb.c: In function 'disable_tlb': tlb.c:175:34: warning: variable '_mas7' set but not used [-Wunused-but-set-variable] Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
336 lines
7.2 KiB
C
336 lines
7.2 KiB
C
/*
|
|
* Copyright 2008-2011 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 ;
|
|
}
|
|
|
|
#ifndef CONFIG_NAND_SPL
|
|
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
|
|
}
|
|
|
|
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;
|
|
|
|
free_tlb_cam(esel);
|
|
|
|
_mas0 = FSL_BOOKE_MAS0(1, esel, 0);
|
|
_mas1 = 0;
|
|
_mas2 = 0;
|
|
_mas3 = 0;
|
|
|
|
mtspr(MAS0, _mas0);
|
|
mtspr(MAS1, _mas1);
|
|
mtspr(MAS2, _mas2);
|
|
mtspr(MAS3, _mas3);
|
|
#ifdef CONFIG_ENABLE_36BIT_PHYS
|
|
mtspr(MAS7, 0);
|
|
#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 wimge = 0;
|
|
unsigned int ram_tlb_address = (unsigned int)CONFIG_SYS_DDR_SDRAM_BASE;
|
|
unsigned int max_cam;
|
|
u64 size, memsize = (u64)memsize_in_meg << 20;
|
|
|
|
#ifdef CONFIG_SYS_PPC_DDR_WIMGE
|
|
wimge = CONFIG_SYS_PPC_DDR_WIMGE;
|
|
#endif
|
|
size = min(memsize, CONFIG_MAX_MEM_MAPPED);
|
|
if ((mfspr(SPRN_MMUCFG) & MMUCFG_MAVN) == MMUCFG_MAVN_V1) {
|
|
/* Convert (4^max) kB to (2^max) bytes */
|
|
max_cam = ((mfspr(SPRN_TLB1CFG) >> 16) & 0xf) * 2 + 10;
|
|
} else {
|
|
/* Convert (2^max) kB to (2^max) bytes */
|
|
max_cam = __ilog2(mfspr(SPRN_TLB1PS)) + 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, wimge,
|
|
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);
|
|
}
|
|
|
|
/* Invalidate the DDR TLBs for the requested size */
|
|
void clear_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg)
|
|
{
|
|
u32 vstart = CONFIG_SYS_DDR_SDRAM_BASE;
|
|
unsigned long epn;
|
|
u32 tsize, valid, ptr;
|
|
phys_addr_t rpn = 0;
|
|
int ddr_esel;
|
|
u64 memsize = (u64)memsize_in_meg << 20;
|
|
|
|
ptr = vstart;
|
|
|
|
while (ptr < (vstart + memsize)) {
|
|
ddr_esel = find_tlb_idx((void *)ptr, 1);
|
|
if (ddr_esel != -1) {
|
|
read_tlbcam_entry(ddr_esel, &valid, &tsize, &epn, &rpn);
|
|
disable_tlb(ddr_esel);
|
|
}
|
|
ptr += TSIZE_TO_BYTES(tsize);
|
|
}
|
|
}
|
|
|
|
void clear_ddr_tlbs(unsigned int memsize_in_meg)
|
|
{
|
|
clear_ddr_tlbs_phys(CONFIG_SYS_DDR_SDRAM_BASE, memsize_in_meg);
|
|
}
|
|
|
|
|
|
#endif /* !CONFIG_NAND_SPL */
|