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u-boot/arch/powerpc/cpu/ppc4xx/cpu.c
Tirumala Marri 1b8fec1393 APM821xx: Add CPU support 
APM821XX is a new line of SoCs which are derivatives of
PPC44X family of processors. This patch adds support of CPU, cache,
tlb, 32k ocm, bootstraps, PLB and AHB bus.

Signed-off-by: Tirumala R Marri <tmarri@apm.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2010-10-04 11:15:02 +02:00

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/*
* (C) Copyright 2000-2007
* 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
*/
/*
* CPU specific code
*
* written or collected and sometimes rewritten by
* Magnus Damm <damm@bitsmart.com>
*
* minor modifications by
* Wolfgang Denk <wd@denx.de>
*/
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <asm/cache.h>
#include <asm/ppc4xx.h>
#include <netdev.h>
DECLARE_GLOBAL_DATA_PTR;
void board_reset(void);
/*
* To provide an interface to detect CPU number for boards that support
* more then one CPU, we implement the "weak" default functions here.
*
* Returns CPU number
*/
int __get_cpu_num(void)
{
return NA_OR_UNKNOWN_CPU;
}
int get_cpu_num(void) __attribute__((weak, alias("__get_cpu_num")));
#if defined(CONFIG_PCI)
#if defined(CONFIG_405GP) || \
defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
#define PCI_ASYNC
static int pci_async_enabled(void)
{
#if defined(CONFIG_405GP)
return (mfdcr(CPC0_PSR) & PSR_PCI_ASYNC_EN);
#endif
#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
defined(CONFIG_460EX) || defined(CONFIG_460GT)
unsigned long val;
mfsdr(SDR0_SDSTP1, val);
return (val & SDR0_SDSTP1_PAME_MASK);
#endif
}
#endif
#endif /* CONFIG_PCI */
#if defined(CONFIG_PCI) && !defined(CONFIG_IOP480) && \
!defined(CONFIG_405) && !defined(CONFIG_405EX)
int pci_arbiter_enabled(void)
{
#if defined(CONFIG_405GP)
return (mfdcr(CPC0_PSR) & PSR_PCI_ARBIT_EN);
#endif
#if defined(CONFIG_405EP)
return (mfdcr(CPC0_PCI) & CPC0_PCI_ARBIT_EN);
#endif
#if defined(CONFIG_440GP)
return (mfdcr(CPC0_STRP1) & CPC0_STRP1_PAE_MASK);
#endif
#if defined(CONFIG_440GX) || defined(CONFIG_440SP) || defined(CONFIG_440SPE)
unsigned long val;
mfsdr(SDR0_XCR0, val);
return (val & SDR0_XCR0_PAE_MASK);
#endif
#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
defined(CONFIG_460EX) || defined(CONFIG_460GT)
unsigned long val;
mfsdr(SDR0_PCI0, val);
return (val & SDR0_PCI0_PAE_MASK);
#endif
}
#endif
#if defined(CONFIG_405EP)
#define I2C_BOOTROM
static int i2c_bootrom_enabled(void)
{
#if defined(CONFIG_405EP)
return (mfdcr(CPC0_BOOT) & CPC0_BOOT_SEP);
#else
unsigned long val;
mfsdr(SDR0_SDCS0, val);
return (val & SDR0_SDCS_SDD);
#endif
}
#endif
#if defined(CONFIG_440GX)
#define SDR0_PINSTP_SHIFT 29
static char *bootstrap_str[] = {
"EBC (16 bits)",
"EBC (8 bits)",
"EBC (32 bits)",
"EBC (8 bits)",
"PCI",
"I2C (Addr 0x54)",
"Reserved",
"I2C (Addr 0x50)",
};
static char bootstrap_char[] = { 'A', 'B', 'C', 'B', 'D', 'E', 'x', 'F' };
#endif
#if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
#define SDR0_PINSTP_SHIFT 30
static char *bootstrap_str[] = {
"EBC (8 bits)",
"PCI",
"I2C (Addr 0x54)",
"I2C (Addr 0x50)",
};
static char bootstrap_char[] = { 'A', 'B', 'C', 'D'};
#endif
#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
#define SDR0_PINSTP_SHIFT 29
static char *bootstrap_str[] = {
"EBC (8 bits)",
"PCI",
"NAND (8 bits)",
"EBC (16 bits)",
"EBC (16 bits)",
"I2C (Addr 0x54)",
"PCI",
"I2C (Addr 0x52)",
};
static char bootstrap_char[] = { 'A', 'B', 'C', 'D', 'E', 'G', 'F', 'H' };
#endif
#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
#define SDR0_PINSTP_SHIFT 29
static char *bootstrap_str[] = {
"EBC (8 bits)",
"EBC (16 bits)",
"EBC (16 bits)",
"NAND (8 bits)",
"PCI",
"I2C (Addr 0x54)",
"PCI",
"I2C (Addr 0x52)",
};
static char bootstrap_char[] = { 'A', 'B', 'C', 'D', 'E', 'G', 'F', 'H' };
#endif
#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define SDR0_PINSTP_SHIFT 29
static char *bootstrap_str[] = {
"EBC (8 bits)",
"EBC (16 bits)",
"PCI",
"PCI",
"EBC (16 bits)",
"NAND (8 bits)",
"I2C (Addr 0x54)", /* A8 */
"I2C (Addr 0x52)", /* A4 */
};
static char bootstrap_char[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H' };
#endif
#if defined(CONFIG_460SX)
#define SDR0_PINSTP_SHIFT 29
static char *bootstrap_str[] = {
"EBC (8 bits)",
"EBC (16 bits)",
"EBC (32 bits)",
"NAND (8 bits)",
"I2C (Addr 0x54)", /* A8 */
"I2C (Addr 0x52)", /* A4 */
};
static char bootstrap_char[] = { 'A', 'B', 'C', 'D', 'E', 'G' };
#endif
#if defined(CONFIG_405EZ)
#define SDR0_PINSTP_SHIFT 28
static char *bootstrap_str[] = {
"EBC (8 bits)",
"SPI (fast)",
"NAND (512 page, 4 addr cycle)",
"I2C (Addr 0x50)",
"EBC (32 bits)",
"I2C (Addr 0x50)",
"NAND (2K page, 5 addr cycle)",
"I2C (Addr 0x50)",
"EBC (16 bits)",
"Reserved",
"NAND (2K page, 4 addr cycle)",
"I2C (Addr 0x50)",
"NAND (512 page, 3 addr cycle)",
"I2C (Addr 0x50)",
"SPI (slow)",
"I2C (Addr 0x50)",
};
static char bootstrap_char[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', \
'I', 'x', 'K', 'L', 'M', 'N', 'O', 'P' };
#endif
#if defined(CONFIG_405EX)
#define SDR0_PINSTP_SHIFT 29
static char *bootstrap_str[] = {
"EBC (8 bits)",
"EBC (16 bits)",
"EBC (16 bits)",
"NAND (8 bits)",
"NAND (8 bits)",
"I2C (Addr 0x54)",
"EBC (8 bits)",
"I2C (Addr 0x52)",
};
static char bootstrap_char[] = { 'A', 'B', 'C', 'D', 'E', 'G', 'F', 'H' };
#endif
#if defined(CONFIG_APM821XX)
#define SDR0_PINSTP_SHIFT 29
static char *bootstrap_str[] = {
"RESERVED",
"RESERVED",
"RESERVED",
"NAND (8 bits)",
"NOR (8 bits)",
"NOR (8 bits) w/PLL Bypassed",
"I2C (Addr 0x54)",
"I2C (Addr 0x52)",
};
static char bootstrap_char[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H' };
#endif
#if defined(SDR0_PINSTP_SHIFT)
static int bootstrap_option(void)
{
unsigned long val;
mfsdr(SDR0_PINSTP, val);
return ((val & 0xf0000000) >> SDR0_PINSTP_SHIFT);
}
#endif /* SDR0_PINSTP_SHIFT */
#if defined(CONFIG_440GP)
static int do_chip_reset (unsigned long sys0, unsigned long sys1)
{
/* Changes to CPC0_SYS0 and CPC0_SYS1 require chip
* reset.
*/
mtdcr (CPC0_CR0, mfdcr (CPC0_CR0) | 0x80000000); /* Set SWE */
mtdcr (CPC0_SYS0, sys0);
mtdcr (CPC0_SYS1, sys1);
mtdcr (CPC0_CR0, mfdcr (CPC0_CR0) & ~0x80000000); /* Clr SWE */
mtspr (SPRN_DBCR0, 0x20000000); /* Reset the chip */
return 1;
}
#endif /* CONFIG_440GP */
int checkcpu (void)
{
#if !defined(CONFIG_405) /* not used on Xilinx 405 FPGA implementations */
uint pvr = get_pvr();
ulong clock = gd->cpu_clk;
char buf[32];
#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
u32 reg;
#endif
#if !defined(CONFIG_IOP480)
char addstr[64] = "";
sys_info_t sys_info;
int cpu_num;
cpu_num = get_cpu_num();
if (cpu_num >= 0)
printf("CPU%d: ", cpu_num);
else
puts("CPU: ");
get_sys_info(&sys_info);
#if defined(CONFIG_XILINX_440)
puts("IBM PowerPC ");
#else
puts("AMCC PowerPC ");
#endif
switch (pvr) {
#if !defined(CONFIG_440)
case PVR_405GP_RB:
puts("405GP Rev. B");
break;
case PVR_405GP_RC:
puts("405GP Rev. C");
break;
case PVR_405GP_RD:
puts("405GP Rev. D");
break;
#ifdef CONFIG_405GP
case PVR_405GP_RE: /* 405GP rev E and 405CR rev C have same PVR */
puts("405GP Rev. E");
break;
#endif
case PVR_405CR_RA:
puts("405CR Rev. A");
break;
case PVR_405CR_RB:
puts("405CR Rev. B");
break;
#ifdef CONFIG_405CR
case PVR_405CR_RC: /* 405GP rev E and 405CR rev C have same PVR */
puts("405CR Rev. C");
break;
#endif
case PVR_405GPR_RB:
puts("405GPr Rev. B");
break;
case PVR_405EP_RB:
puts("405EP Rev. B");
break;
case PVR_405EZ_RA:
puts("405EZ Rev. A");
break;
case PVR_405EX1_RA:
puts("405EX Rev. A");
strcpy(addstr, "Security support");
break;
case PVR_405EXR2_RA:
puts("405EXr Rev. A");
strcpy(addstr, "No Security support");
break;
case PVR_405EX1_RC:
puts("405EX Rev. C");
strcpy(addstr, "Security support");
break;
case PVR_405EX2_RC:
puts("405EX Rev. C");
strcpy(addstr, "No Security support");
break;
case PVR_405EXR1_RC:
puts("405EXr Rev. C");
strcpy(addstr, "Security support");
break;
case PVR_405EXR2_RC:
puts("405EXr Rev. C");
strcpy(addstr, "No Security support");
break;
case PVR_405EX1_RD:
puts("405EX Rev. D");
strcpy(addstr, "Security support");
break;
case PVR_405EX2_RD:
puts("405EX Rev. D");
strcpy(addstr, "No Security support");
break;
case PVR_405EXR1_RD:
puts("405EXr Rev. D");
strcpy(addstr, "Security support");
break;
case PVR_405EXR2_RD:
puts("405EXr Rev. D");
strcpy(addstr, "No Security support");
break;
#else /* CONFIG_440 */
#if defined(CONFIG_440GP)
case PVR_440GP_RB:
puts("440GP Rev. B");
/* See errata 1.12: CHIP_4 */
if ((mfdcr(CPC0_SYS0) != mfdcr(CPC0_STRP0)) ||
(mfdcr(CPC0_SYS1) != mfdcr(CPC0_STRP1)) ){
puts ( "\n\t CPC0_SYSx DCRs corrupted. "
"Resetting chip ...\n");
udelay( 1000 * 1000 ); /* Give time for serial buf to clear */
do_chip_reset ( mfdcr(CPC0_STRP0),
mfdcr(CPC0_STRP1) );
}
break;
case PVR_440GP_RC:
puts("440GP Rev. C");
break;
#endif /* CONFIG_440GP */
case PVR_440GX_RA:
puts("440GX Rev. A");
break;
case PVR_440GX_RB:
puts("440GX Rev. B");
break;
case PVR_440GX_RC:
puts("440GX Rev. C");
break;
case PVR_440GX_RF:
puts("440GX Rev. F");
break;
case PVR_440EP_RA:
puts("440EP Rev. A");
break;
#ifdef CONFIG_440EP
case PVR_440EP_RB: /* 440EP rev B and 440GR rev A have same PVR */
puts("440EP Rev. B");
break;
case PVR_440EP_RC: /* 440EP rev C and 440GR rev B have same PVR */
puts("440EP Rev. C");
break;
#endif /* CONFIG_440EP */
#ifdef CONFIG_440GR
case PVR_440GR_RA: /* 440EP rev B and 440GR rev A have same PVR */
puts("440GR Rev. A");
break;
case PVR_440GR_RB: /* 440EP rev C and 440GR rev B have same PVR */
puts("440GR Rev. B");
break;
#endif /* CONFIG_440GR */
#ifdef CONFIG_440EPX
case PVR_440EPX1_RA: /* 440EPx rev A and 440GRx rev A have same PVR */
puts("440EPx Rev. A");
strcpy(addstr, "Security/Kasumi support");
break;
case PVR_440EPX2_RA: /* 440EPx rev A and 440GRx rev A have same PVR */
puts("440EPx Rev. A");
strcpy(addstr, "No Security/Kasumi support");
break;
#endif /* CONFIG_440EPX */
#ifdef CONFIG_440GRX
case PVR_440GRX1_RA: /* 440EPx rev A and 440GRx rev A have same PVR */
puts("440GRx Rev. A");
strcpy(addstr, "Security/Kasumi support");
break;
case PVR_440GRX2_RA: /* 440EPx rev A and 440GRx rev A have same PVR */
puts("440GRx Rev. A");
strcpy(addstr, "No Security/Kasumi support");
break;
#endif /* CONFIG_440GRX */
case PVR_440SP_6_RAB:
puts("440SP Rev. A/B");
strcpy(addstr, "RAID 6 support");
break;
case PVR_440SP_RAB:
puts("440SP Rev. A/B");
strcpy(addstr, "No RAID 6 support");
break;
case PVR_440SP_6_RC:
puts("440SP Rev. C");
strcpy(addstr, "RAID 6 support");
break;
case PVR_440SP_RC:
puts("440SP Rev. C");
strcpy(addstr, "No RAID 6 support");
break;
case PVR_440SPe_6_RA:
puts("440SPe Rev. A");
strcpy(addstr, "RAID 6 support");
break;
case PVR_440SPe_RA:
puts("440SPe Rev. A");
strcpy(addstr, "No RAID 6 support");
break;
case PVR_440SPe_6_RB:
puts("440SPe Rev. B");
strcpy(addstr, "RAID 6 support");
break;
case PVR_440SPe_RB:
puts("440SPe Rev. B");
strcpy(addstr, "No RAID 6 support");
break;
#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
case PVR_460EX_RA:
puts("460EX Rev. A");
strcpy(addstr, "No Security/Kasumi support");
break;
case PVR_460EX_SE_RA:
puts("460EX Rev. A");
strcpy(addstr, "Security/Kasumi support");
break;
case PVR_460EX_RB:
puts("460EX Rev. B");
mfsdr(SDR0_ECID3, reg);
if (reg & 0x00100000)
strcpy(addstr, "No Security/Kasumi support");
else
strcpy(addstr, "Security/Kasumi support");
break;
case PVR_460GT_RA:
puts("460GT Rev. A");
strcpy(addstr, "No Security/Kasumi support");
break;
case PVR_460GT_SE_RA:
puts("460GT Rev. A");
strcpy(addstr, "Security/Kasumi support");
break;
case PVR_460GT_RB:
puts("460GT Rev. B");
mfsdr(SDR0_ECID3, reg);
if (reg & 0x00100000)
strcpy(addstr, "No Security/Kasumi support");
else
strcpy(addstr, "Security/Kasumi support");
break;
#endif
case PVR_460SX_RA:
puts("460SX Rev. A");
strcpy(addstr, "Security support");
break;
case PVR_460SX_RA_V1:
puts("460SX Rev. A");
strcpy(addstr, "No Security support");
break;
case PVR_460GX_RA:
puts("460GX Rev. A");
strcpy(addstr, "Security support");
break;
case PVR_460GX_RA_V1:
puts("460GX Rev. A");
strcpy(addstr, "No Security support");
break;
case PVR_APM821XX_RA:
puts("APM821XX Rev. A");
strcpy(addstr, "Security support");
break;
case PVR_VIRTEX5:
puts("440x5 VIRTEX5");
break;
#endif /* CONFIG_440 */
default:
printf (" UNKNOWN (PVR=%08x)", pvr);
break;
}
printf (" at %s MHz (PLB=%lu OPB=%lu EBC=%lu",
strmhz(buf, clock),
sys_info.freqPLB / 1000000,
get_OPB_freq() / 1000000,
sys_info.freqEBC / 1000000);
#if defined(CONFIG_PCI) && \
(defined(CONFIG_440EP) || defined(CONFIG_440EPX) || \
defined(CONFIG_440GR) || defined(CONFIG_440GRX))
printf(" PCI=%lu MHz", sys_info.freqPCI / 1000000);
#endif
printf(")\n");
if (addstr[0] != 0)
printf(" %s\n", addstr);
#if defined(I2C_BOOTROM)
printf (" I2C boot EEPROM %sabled\n", i2c_bootrom_enabled() ? "en" : "dis");
#endif /* I2C_BOOTROM */
#if defined(SDR0_PINSTP_SHIFT)
printf (" Bootstrap Option %c - ", bootstrap_char[bootstrap_option()]);
printf ("Boot ROM Location %s", bootstrap_str[bootstrap_option()]);
#ifdef CONFIG_NAND_U_BOOT
puts(", booting from NAND");
#endif /* CONFIG_NAND_U_BOOT */
putc('\n');
#endif /* SDR0_PINSTP_SHIFT */
#if defined(CONFIG_PCI) && !defined(CONFIG_405EX)
printf (" Internal PCI arbiter %sabled", pci_arbiter_enabled() ? "en" : "dis");
#endif
#if defined(CONFIG_PCI) && defined(PCI_ASYNC)
if (pci_async_enabled()) {
printf (", PCI async ext clock used");
} else {
printf (", PCI sync clock at %lu MHz",
sys_info.freqPLB / sys_info.pllPciDiv / 1000000);
}
#endif
#if defined(CONFIG_PCI) && !defined(CONFIG_405EX)
putc('\n');
#endif
#if defined(CONFIG_405EP) || defined(CONFIG_405EZ) || defined(CONFIG_405EX)
printf (" 16 kB I-Cache 16 kB D-Cache");
#elif defined(CONFIG_440)
printf (" 32 kB I-Cache 32 kB D-Cache");
#else
printf (" 16 kB I-Cache %d kB D-Cache",
((pvr | 0x00000001) == PVR_405GPR_RB) ? 16 : 8);
#endif
#endif /* !defined(CONFIG_IOP480) */
#if defined(CONFIG_IOP480)
printf ("PLX IOP480 (PVR=%08x)", pvr);
printf (" at %s MHz:", strmhz(buf, clock));
printf (" %u kB I-Cache", 4);
printf (" %u kB D-Cache", 2);
#endif
#endif /* !defined(CONFIG_405) */
putc ('\n');
return 0;
}
int ppc440spe_revB() {
unsigned int pvr;
pvr = get_pvr();
if ((pvr == PVR_440SPe_6_RB) || (pvr == PVR_440SPe_RB))
return 1;
else
return 0;
}
/* ------------------------------------------------------------------------- */
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
#if defined(CONFIG_BOARD_RESET)
board_reset();
#else
#if defined(CONFIG_SYS_4xx_RESET_TYPE)
mtspr(SPRN_DBCR0, CONFIG_SYS_4xx_RESET_TYPE << 28);
#else
/*
* Initiate system reset in debug control register DBCR
*/
mtspr(SPRN_DBCR0, 0x30000000);
#endif /* defined(CONFIG_SYS_4xx_RESET_TYPE) */
#endif /* defined(CONFIG_BOARD_RESET) */
return 1;
}
/*
* Get timebase clock frequency
*/
unsigned long get_tbclk (void)
{
#if !defined(CONFIG_IOP480)
sys_info_t sys_info;
get_sys_info(&sys_info);
return (sys_info.freqProcessor);
#else
return (66000000);
#endif
}
#if defined(CONFIG_WATCHDOG)
void watchdog_reset(void)
{
int re_enable = disable_interrupts();
reset_4xx_watchdog();
if (re_enable) enable_interrupts();
}
void reset_4xx_watchdog(void)
{
/*
* Clear TSR(WIS) bit
*/
mtspr(SPRN_TSR, 0x40000000);
}
#endif /* CONFIG_WATCHDOG */
/*
* Initializes on-chip ethernet controllers.
* to override, implement board_eth_init()
*/
int cpu_eth_init(bd_t *bis)
{
#if defined(CONFIG_PPC4xx_EMAC)
ppc_4xx_eth_initialize(bis);
#endif
return 0;
}
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