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u-boot/cpu/mpc5xxx/cpu_init.c
Wolfgang Denk 8419c01304 MPC5200: enable snooping of DMA transactions on XLB even if no PCI 
is configured; othrwise DMA accesses aren't cache coherent which
causes for example USB to fail.
2006-04-18 11:05:03 +02:00

208 lines
6.1 KiB
C
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/*
* (C) Copyright 2000-2003
* 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 <mpc5xxx.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Breath some life into the CPU...
*
* Set up the memory map,
* initialize a bunch of registers.
*/
void cpu_init_f (void)
{
unsigned long addecr = (1 << 25); /* Boot_CS */
#if defined(CFG_RAMBOOT) && defined(CONFIG_MGT5100)
addecr |= (1 << 22); /* SDRAM enable */
#endif
/* Pointer is writable since we allocated a register for it */
gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);
/* Clear initial global data */
memset ((void *) gd, 0, sizeof (gd_t));
/*
* Memory Controller: configure chip selects and enable them
*/
#if defined(CFG_BOOTCS_START) && defined(CFG_BOOTCS_SIZE)
*(vu_long *)MPC5XXX_BOOTCS_START = START_REG(CFG_BOOTCS_START);
*(vu_long *)MPC5XXX_BOOTCS_STOP = STOP_REG(CFG_BOOTCS_START,
CFG_BOOTCS_SIZE);
#endif
#if defined(CFG_BOOTCS_CFG)
*(vu_long *)MPC5XXX_BOOTCS_CFG = CFG_BOOTCS_CFG;
#endif
#if defined(CFG_CS0_START) && defined(CFG_CS0_SIZE)
*(vu_long *)MPC5XXX_CS0_START = START_REG(CFG_CS0_START);
*(vu_long *)MPC5XXX_CS0_STOP = STOP_REG(CFG_CS0_START, CFG_CS0_SIZE);
/* CS0 and BOOT_CS cannot be enabled at once. */
/* addecr |= (1 << 16); */
#endif
#if defined(CFG_CS0_CFG)
*(vu_long *)MPC5XXX_CS0_CFG = CFG_CS0_CFG;
#endif
#if defined(CFG_CS1_START) && defined(CFG_CS1_SIZE)
*(vu_long *)MPC5XXX_CS1_START = START_REG(CFG_CS1_START);
*(vu_long *)MPC5XXX_CS1_STOP = STOP_REG(CFG_CS1_START, CFG_CS1_SIZE);
addecr |= (1 << 17);
#endif
#if defined(CFG_CS1_CFG)
*(vu_long *)MPC5XXX_CS1_CFG = CFG_CS1_CFG;
#endif
#if defined(CFG_CS2_START) && defined(CFG_CS2_SIZE)
*(vu_long *)MPC5XXX_CS2_START = START_REG(CFG_CS2_START);
*(vu_long *)MPC5XXX_CS2_STOP = STOP_REG(CFG_CS2_START, CFG_CS2_SIZE);
addecr |= (1 << 18);
#endif
#if defined(CFG_CS2_CFG)
*(vu_long *)MPC5XXX_CS2_CFG = CFG_CS2_CFG;
#endif
#if defined(CFG_CS3_START) && defined(CFG_CS3_SIZE)
*(vu_long *)MPC5XXX_CS3_START = START_REG(CFG_CS3_START);
*(vu_long *)MPC5XXX_CS3_STOP = STOP_REG(CFG_CS3_START, CFG_CS3_SIZE);
addecr |= (1 << 19);
#endif
#if defined(CFG_CS3_CFG)
*(vu_long *)MPC5XXX_CS3_CFG = CFG_CS3_CFG;
#endif
#if defined(CFG_CS4_START) && defined(CFG_CS4_SIZE)
*(vu_long *)MPC5XXX_CS4_START = START_REG(CFG_CS4_START);
*(vu_long *)MPC5XXX_CS4_STOP = STOP_REG(CFG_CS4_START, CFG_CS4_SIZE);
addecr |= (1 << 20);
#endif
#if defined(CFG_CS4_CFG)
*(vu_long *)MPC5XXX_CS4_CFG = CFG_CS4_CFG;
#endif
#if defined(CFG_CS5_START) && defined(CFG_CS5_SIZE)
*(vu_long *)MPC5XXX_CS5_START = START_REG(CFG_CS5_START);
*(vu_long *)MPC5XXX_CS5_STOP = STOP_REG(CFG_CS5_START, CFG_CS5_SIZE);
addecr |= (1 << 21);
#endif
#if defined(CFG_CS5_CFG)
*(vu_long *)MPC5XXX_CS5_CFG = CFG_CS5_CFG;
#endif
#if defined(CONFIG_MPC5200)
addecr |= 1;
#if defined(CFG_CS6_START) && defined(CFG_CS6_SIZE)
*(vu_long *)MPC5XXX_CS6_START = START_REG(CFG_CS6_START);
*(vu_long *)MPC5XXX_CS6_STOP = STOP_REG(CFG_CS6_START, CFG_CS6_SIZE);
addecr |= (1 << 26);
#endif
#if defined(CFG_CS6_CFG)
*(vu_long *)MPC5XXX_CS6_CFG = CFG_CS6_CFG;
#endif
#if defined(CFG_CS7_START) && defined(CFG_CS7_SIZE)
*(vu_long *)MPC5XXX_CS7_START = START_REG(CFG_CS5_START);
*(vu_long *)MPC5XXX_CS7_STOP = STOP_REG(CFG_CS7_START, CFG_CS7_SIZE);
addecr |= (1 << 27);
#endif
#if defined(CFG_CS7_CFG)
*(vu_long *)MPC5XXX_CS7_CFG = CFG_CS7_CFG;
#endif
#if defined(CFG_CS_BURST)
*(vu_long *)MPC5XXX_CS_BURST = CFG_CS_BURST;
#endif
#if defined(CFG_CS_DEADCYCLE)
*(vu_long *)MPC5XXX_CS_DEADCYCLE = CFG_CS_DEADCYCLE;
#endif
#endif /* CONFIG_MPC5200 */
/* Enable chip selects */
*(vu_long *)MPC5XXX_ADDECR = addecr;
*(vu_long *)MPC5XXX_CS_CTRL = (1 << 24);
/* Setup pin multiplexing */
#if defined(CFG_GPS_PORT_CONFIG)
*(vu_long *)MPC5XXX_GPS_PORT_CONFIG = CFG_GPS_PORT_CONFIG;
#endif
#if defined(CONFIG_MPC5200)
/* enable timebase */
*(vu_long *)(MPC5XXX_XLBARB + 0x40) |= (1 << 13);
/* Enable snooping for RAM */
*(vu_long *)(MPC5XXX_XLBARB + 0x40) |= (1 << 15);
*(vu_long *)(MPC5XXX_XLBARB + 0x70) = CFG_SDRAM_BASE | 0x1d;
# if defined(CFG_IPBSPEED_133)
/* Motorola reports IPB should better run at 133 MHz. */
*(vu_long *)MPC5XXX_ADDECR |= 1;
/* pci_clk_sel = 0x02, ipb_clk_sel = 0x00; */
addecr = *(vu_long *)MPC5XXX_CDM_CFG;
addecr &= ~0x103;
# if defined(CFG_PCISPEED_66)
/* pci_clk_sel = 0x01 -> IPB_CLK/2 */
addecr |= 0x01;
# else
/* pci_clk_sel = 0x02 -> XLB_CLK/4 = IPB_CLK/4 */
addecr |= 0x02;
# endif /* CFG_PCISPEED_66 */
*(vu_long *)MPC5XXX_CDM_CFG = addecr;
# endif /* CFG_IPBSPEED_133 */
/* Configure the XLB Arbiter */
*(vu_long *)MPC5XXX_XLBARB_MPRIEN = 0xff;
*(vu_long *)MPC5XXX_XLBARB_MPRIVAL = 0x11111111;
# if defined(CFG_XLB_PIPELINING)
/* Enable piplining */
*(vu_long *)(MPC5XXX_XLBARB + 0x40) &= ~(1 << 31);
# endif
#endif /* CONFIG_MPC5200 */
}
/*
* initialize higher level parts of CPU like time base and timers
*/
int cpu_init_r (void)
{
/* mask all interrupts */
#if defined(CONFIG_MGT5100)
*(vu_long *)MPC5XXX_ICTL_PER_MASK = 0xfffffc00;
#elif defined(CONFIG_MPC5200)
*(vu_long *)MPC5XXX_ICTL_PER_MASK = 0xffffff00;
#endif
*(vu_long *)MPC5XXX_ICTL_CRIT |= 0x0001ffff;
*(vu_long *)MPC5XXX_ICTL_EXT &= ~0x00000f00;
/* route critical ints to normal ints */
*(vu_long *)MPC5XXX_ICTL_EXT |= 0x00000001;
#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_MPC5xxx_FEC)
/* load FEC microcode */
loadtask(0, 2);
#endif
return (0);
}
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