blob: affaeff1ae47f978aad928d9a05817750c554832 [file] [log] [blame]
/*
* (C) Copyright 2006
* Sylvie Gohl, AMCC/IBM, gohl.sylvie@fr.ibm.com
* Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com
* Thierry Roman, AMCC/IBM, thierry_roman@fr.ibm.com
* Alain Saurel, AMCC/IBM, alain.saurel@fr.ibm.com
* Robert Snyder, AMCC/IBM, rob.snyder@fr.ibm.com
*
* (C) Copyright 2007
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* 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
*/
/* define DEBUG for debugging output (obviously ;-)) */
#if 0
#define DEBUG
#endif
#include <common.h>
#include <asm/processor.h>
#include <asm/mmu.h>
#include <asm/io.h>
#include <ppc440.h>
/*
* This DDR2 setup code can dynamically setup the TLB entries for the DDR2 memory
* region. Right now the cache should still be disabled in U-Boot because of the
* EMAC driver, that need it's buffer descriptor to be located in non cached
* memory.
*
* If at some time this restriction doesn't apply anymore, just define
* CFG_ENABLE_SDRAM_CACHE in the board config file and this code should setup
* everything correctly.
*/
#ifdef CFG_ENABLE_SDRAM_CACHE
#define MY_TLB_WORD2_I_ENABLE 0 /* enable caching on SDRAM */
#else
#define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE /* disable caching on SDRAM */
#endif
/*-----------------------------------------------------------------------------+
* Prototypes
*-----------------------------------------------------------------------------*/
extern int denali_wait_for_dlllock(void);
extern void denali_core_search_data_eye(void);
extern void dcbz_area(u32 start_address, u32 num_bytes);
extern void dflush(void);
static u32 is_ecc_enabled(void)
{
u32 val;
mfsdram(DDR0_22, val);
val &= DDR0_22_CTRL_RAW_MASK;
if (val)
return 1;
else
return 0;
}
void board_add_ram_info(int use_default)
{
PPC4xx_SYS_INFO board_cfg;
u32 val;
if (is_ecc_enabled())
puts(" (ECC");
else
puts(" (ECC not");
get_sys_info(&board_cfg);
printf(" enabled, %d MHz", (board_cfg.freqPLB * 2) / 1000000);
mfsdram(DDR0_03, val);
val = DDR0_03_CASLAT_DECODE(val);
printf(", CL%d)", val);
}
#ifdef CONFIG_DDR_ECC
static void wait_ddr_idle(void)
{
/*
* Controller idle status cannot be determined for Denali
* DDR2 code. Just return here.
*/
}
static void blank_string(int size)
{
int i;
for (i=0; i<size; i++)
putc('\b');
for (i=0; i<size; i++)
putc(' ');
for (i=0; i<size; i++)
putc('\b');
}
static void program_ecc(u32 start_address,
u32 num_bytes,
u32 tlb_word2_i_value)
{
u32 current_address;
u32 end_address;
u32 address_increment;
u32 val;
char str[] = "ECC generation -";
char slash[] = "\\|/-\\|/-";
int loop = 0;
int loopi = 0;
current_address = start_address;
sync();
eieio();
wait_ddr_idle();
if (tlb_word2_i_value == TLB_WORD2_I_ENABLE) {
/* ECC bit set method for non-cached memory */
address_increment = 4;
end_address = current_address + num_bytes;
puts(str);
while (current_address < end_address) {
*((u32 *)current_address) = 0x00000000;
current_address += address_increment;
if ((loop++ % (2 << 20)) == 0) {
putc('\b');
putc(slash[loopi++ % 8]);
}
}
blank_string(strlen(str));
} else {
/* ECC bit set method for cached memory */
#if 0 /* test-only: will remove this define later, when ECC problems are solved! */
/*
* Some boards (like lwmon5) need to preserve the memory
* content upon ECC generation (for the log-buffer).
* Therefore we don't fill the memory with a pattern or
* just zero it, but write the same values back that are
* already in the memory cells.
*/
address_increment = CFG_CACHELINE_SIZE;
end_address = current_address + num_bytes;
current_address = start_address;
while (current_address < end_address) {
/*
* TODO: Th following sequence doesn't work correctly.
* Just invalidating and flushing the cache doesn't
* seem to trigger the re-write of the memory.
*/
ppcDcbi(current_address);
ppcDcbf(current_address);
current_address += CFG_CACHELINE_SIZE;
}
#else
dcbz_area(start_address, num_bytes);
dflush();
#endif
}
sync();
eieio();
wait_ddr_idle();
/* Clear error status */
mfsdram(DDR0_00, val);
mtsdram(DDR0_00, val | DDR0_00_INT_ACK_ALL);
/* Set 'int_mask' parameter to functionnal value */
mfsdram(DDR0_01, val);
mtsdram(DDR0_01, ((val &~ DDR0_01_INT_MASK_MASK) | DDR0_01_INT_MASK_ALL_OFF));
sync();
eieio();
wait_ddr_idle();
}
#endif
/*************************************************************************
*
* initdram -- 440EPx's DDR controller is a DENALI Core
*
************************************************************************/
long int initdram (int board_type)
{
#if 0 /* test-only: will remove this define later, when ECC problems are solved! */
/* CL=3 */
mtsdram(DDR0_02, 0x00000000);
mtsdram(DDR0_00, 0x0000190A);
mtsdram(DDR0_01, 0x01000000);
mtsdram(DDR0_03, 0x02030603); /* A suitable burst length was taken. CAS is right for our board */
mtsdram(DDR0_04, 0x0A030300);
mtsdram(DDR0_05, 0x02020308);
mtsdram(DDR0_06, 0x0103C812);
mtsdram(DDR0_07, 0x00090100);
mtsdram(DDR0_08, 0x02c80001);
mtsdram(DDR0_09, 0x00011D5F);
mtsdram(DDR0_10, 0x00000300);
mtsdram(DDR0_11, 0x000CC800);
mtsdram(DDR0_12, 0x00000003);
mtsdram(DDR0_14, 0x00000000);
mtsdram(DDR0_17, 0x1e000000);
mtsdram(DDR0_18, 0x1e1e1e1e);
mtsdram(DDR0_19, 0x1e1e1e1e);
mtsdram(DDR0_20, 0x0B0B0B0B);
mtsdram(DDR0_21, 0x0B0B0B0B);
#ifdef CONFIG_DDR_ECC
mtsdram(DDR0_22, 0x00267F0B | DDR0_22_CTRL_RAW_ECC_ENABLE); /* enable ECC */
#else
mtsdram(DDR0_22, 0x00267F0B);
#endif
mtsdram(DDR0_23, 0x01000000);
mtsdram(DDR0_24, 0x01010001);
mtsdram(DDR0_26, 0x2D93028A);
mtsdram(DDR0_27, 0x0784682B);
mtsdram(DDR0_28, 0x00000080);
mtsdram(DDR0_31, 0x00000000);
mtsdram(DDR0_42, 0x01000006);
mtsdram(DDR0_43, 0x030A0200);
mtsdram(DDR0_44, 0x00000003);
mtsdram(DDR0_02, 0x00000001); /* Activate the denali core */
#else
/* CL=4 */
mtsdram(DDR0_02, 0x00000000);
mtsdram(DDR0_00, 0x0000190A);
mtsdram(DDR0_01, 0x01000000);
mtsdram(DDR0_03, 0x02040803); /* A suitable burst length was taken. CAS is right for our board */
mtsdram(DDR0_04, 0x0B030300);
mtsdram(DDR0_05, 0x02020308);
mtsdram(DDR0_06, 0x0003C812);
mtsdram(DDR0_07, 0x00090100);
mtsdram(DDR0_08, 0x03c80001);
mtsdram(DDR0_09, 0x00011D5F);
mtsdram(DDR0_10, 0x00000300);
mtsdram(DDR0_11, 0x000CC800);
mtsdram(DDR0_12, 0x00000003);
mtsdram(DDR0_14, 0x00000000);
mtsdram(DDR0_17, 0x1e000000);
mtsdram(DDR0_18, 0x1e1e1e1e);
mtsdram(DDR0_19, 0x1e1e1e1e);
mtsdram(DDR0_20, 0x0B0B0B0B);
mtsdram(DDR0_21, 0x0B0B0B0B);
#ifdef CONFIG_DDR_ECC
mtsdram(DDR0_22, 0x00267F0B | DDR0_22_CTRL_RAW_ECC_ENABLE); /* enable ECC */
#else
mtsdram(DDR0_22, 0x00267F0B);
#endif
mtsdram(DDR0_23, 0x01000000);
mtsdram(DDR0_24, 0x01010001);
mtsdram(DDR0_26, 0x2D93028A);
mtsdram(DDR0_27, 0x0784682B);
mtsdram(DDR0_28, 0x00000080);
mtsdram(DDR0_31, 0x00000000);
mtsdram(DDR0_42, 0x01000008);
mtsdram(DDR0_43, 0x050A0200);
mtsdram(DDR0_44, 0x00000005);
mtsdram(DDR0_02, 0x00000001); /* Activate the denali core */
#endif
denali_wait_for_dlllock();
#if defined(CONFIG_DDR_DATA_EYE)
/* -----------------------------------------------------------+
* Perform data eye search if requested.
* ----------------------------------------------------------*/
program_tlb(0, CFG_SDRAM_BASE, CFG_MBYTES_SDRAM << 20,
TLB_WORD2_I_ENABLE);
denali_core_search_data_eye();
remove_tlb(CFG_SDRAM_BASE, CFG_MBYTES_SDRAM << 20);
#endif
/*
* Program tlb entries for this size (dynamic)
*/
program_tlb(0, CFG_SDRAM_BASE, CFG_MBYTES_SDRAM << 20,
MY_TLB_WORD2_I_ENABLE);
/*
* Setup 2nd TLB with same physical address but different virtual address
* with cache enabled. This is done for fast ECC generation.
*/
program_tlb(0, CFG_DDR_CACHED_ADDR, CFG_MBYTES_SDRAM << 20, 0);
#ifdef CONFIG_DDR_ECC
/*
* If ECC is enabled, initialize the parity bits.
*/
program_ecc(CFG_DDR_CACHED_ADDR, CFG_MBYTES_SDRAM << 20, 0);
#endif
/*
* Clear possible errors resulting from data-eye-search.
* If not done, then we could get an interrupt later on when
* exceptions are enabled.
*/
set_mcsr(get_mcsr());
return (CFG_MBYTES_SDRAM << 20);
}