Initial revision

2 files changed, 466 insertions, 0 deletions

diff --git a/cpu/mpc824x/cpu.c b/cpu/mpc824x/cpu.c
new file mode 100644
index 0000000..0d822d5
--- /dev/null
+++ b/cpu/mpc824x/cpu.c
@@ -0,0 +1,281 @@
+/*
+ * (C) Copyright 2000 - 2002
+ * 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 <config.h>
+#include <mpc824x.h>
+#include <common.h>
+#include <command.h>
+
+int checkcpu (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	unsigned int pvr = get_pvr ();
+	unsigned int version = pvr >> 16;
+	unsigned char revision;
+	ulong clock = gd->cpu_clk;
+	char buf[32];
+
+	puts ("CPU:   ");
+
+	switch (version) {
+	case CPU_TYPE_8240:
+		puts ("MPC8240");
+		break;
+
+	case CPU_TYPE_8245:
+		puts ("MPC8245");
+		break;
+
+	default:
+		return -1;		/*not valid for this source */
+	}
+
+	CONFIG_READ_BYTE (REVID, revision);
+
+	if (revision) {
+		printf (" Revision %d.%d",
+			(revision & 0xf0) >> 4,
+			(revision & 0x0f));
+	} else {
+		return -1;		/* no valid CPU revision info */
+	}
+
+	printf (" at %s MHz:", strmhz (buf, clock));
+
+	printf (" %u kB I-Cache", checkicache () >> 10);
+	printf (" %u kB D-Cache", checkdcache () >> 10);
+
+	puts ("\n");
+
+	return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+/* L1 i-cache                                                                */
+
+int checkicache (void)
+{
+	 /*TODO*/
+	 return 128 * 4 * 32;
+};
+
+/* ------------------------------------------------------------------------- */
+/* L1 d-cache                                                                */
+
+int checkdcache (void)
+{
+	 /*TODO*/
+	 return 128 * 4 * 32;
+
+};
+
+/*------------------------------------------------------------------- */
+
+int do_reset (cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc,
+			  char *argv[])
+{
+	ulong msr, addr;
+
+	/* Interrupts and MMU off */
+	__asm__ ("mtspr    81, 0");
+
+	/* Interrupts and MMU off */
+	__asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
+
+	msr &= ~0x1030;
+	__asm__ __volatile__ ("mtmsr    %0"::"r" (msr));
+
+	/*
+	 * Trying to execute the next instruction at a non-existing address
+	 * should cause a machine check, resulting in reset
+	 */
+#ifdef CFG_RESET_ADDRESS
+	addr = CFG_RESET_ADDRESS;
+#else
+	/*
+         * note: when CFG_MONITOR_BASE points to a RAM address,
+         * CFG_MONITOR_BASE - sizeof (ulong) is usually a valid
+         * address. Better pick an address known to be invalid on
+         * your system and assign it to CFG_RESET_ADDRESS.
+         * "(ulong)-1" used to be a good choice for many systems...
+	 */
+	addr = CFG_MONITOR_BASE - sizeof (ulong);
+#endif
+	((void (*)(void)) addr) ();
+	return 1;
+
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Get timebase clock frequency (like cpu_clk in Hz)
+ * This is the sys_logic_clk (memory bus) divided by 4
+ */
+unsigned long get_tbclk (void)
+{
+	return ((get_bus_freq (0) + 2L) / 4L);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * The MPC824x has an integrated PCI controller known as the MPC107.
+ * The following are MPC107 Bridge Controller and PCI Support functions
+ *
+ */
+
+/*
+ *  This procedure reads a 32-bit address MPC107 register, and returns
+ *  a 32 bit value.  It swaps the address to little endian before
+ *  writing it to config address, and swaps the value to big endian
+ *  before returning to the caller.
+ */
+unsigned int mpc824x_mpc107_getreg (unsigned int regNum)
+{
+	unsigned int temp;
+
+	/* swap the addr. to little endian */
+	*(volatile unsigned int *) CHRP_REG_ADDR = PCISWAP (regNum);
+	temp = *(volatile unsigned int *) CHRP_REG_DATA;
+	return PCISWAP (temp);		/* swap the data upon return */
+}
+
+/*
+ *  This procedure writes a 32-bit address MPC107 register.  It swaps
+ *  the address to little endian before writing it to config address.
+ */
+
+void mpc824x_mpc107_setreg (unsigned int regNum, unsigned int regVal)
+{
+	/* swap the addr. to little endian */
+	*(volatile unsigned int *) CHRP_REG_ADDR = PCISWAP (regNum);
+	*(volatile unsigned int *) CHRP_REG_DATA = PCISWAP (regVal);
+	return;
+}
+
+
+/*
+ *  Write a byte (8 bits) to a memory location.
+ */
+void mpc824x_mpc107_write8 (unsigned int addr, unsigned char data)
+{
+	*(unsigned char *) addr = data;
+	__asm__ ("sync");
+}
+
+/*
+ *  Write a word (16 bits) to a memory location after the value
+ *  has been byte swapped (big to little endian or vice versa)
+ */
+
+void mpc824x_mpc107_write16 (unsigned int address, unsigned short data)
+{
+	*(volatile unsigned short *) address = BYTE_SWAP_16_BIT (data);
+	__asm__ ("sync");
+}
+
+/*
+ *  Write a long word (32 bits) to a memory location after the value
+ *  has been byte swapped (big to little endian or vice versa)
+ */
+
+void mpc824x_mpc107_write32 (unsigned int address, unsigned int data)
+{
+	*(volatile unsigned int *) address = LONGSWAP (data);
+	__asm__ ("sync");
+}
+
+/*
+ *  Read a byte (8 bits) from a memory location.
+ */
+unsigned char mpc824x_mpc107_read8 (unsigned int addr)
+{
+	return *(volatile unsigned char *) addr;
+}
+
+
+/*
+ *  Read a word (16 bits) from a memory location, and byte swap the
+ *  value before returning to the caller.
+ */
+unsigned short mpc824x_mpc107_read16 (unsigned int address)
+{
+	unsigned short retVal;
+
+	retVal = BYTE_SWAP_16_BIT (*(unsigned short *) address);
+	return retVal;
+}
+
+
+/*
+ *  Read a long word (32 bits) from a memory location, and byte
+ *  swap the value before returning to the caller.
+ */
+unsigned int mpc824x_mpc107_read32 (unsigned int address)
+{
+	unsigned int retVal;
+
+	retVal = LONGSWAP (*(unsigned int *) address);
+	return (retVal);
+}
+
+
+/*
+ *  Read a register in the Embedded Utilities Memory Block address
+ *  space.
+ *  Input: regNum - register number + utility base address.  Example,
+ *         the base address of EPIC is 0x40000, the register number
+ *	   being passed is 0x40000+the address of the target register.
+ *	   (See epic.h for register addresses).
+ *  Output:  The 32 bit little endian value of the register.
+ */
+
+unsigned int mpc824x_eummbar_read (unsigned int regNum)
+{
+	unsigned int temp;
+
+	temp = *(volatile unsigned int *) (EUMBBAR_VAL + regNum);
+	temp = PCISWAP (temp);
+	return temp;
+}
+
+
+/*
+ *  Write a value to a register in the Embedded Utilities Memory
+ *  Block address space.
+ *  Input: regNum - register number + utility base address.  Example,
+ *                  the base address of EPIC is 0x40000, the register
+ *	            number is 0x40000+the address of the target register.
+ *	            (See epic.h for register addresses).
+ *         regVal - value to be written to the register.
+ */
+
+void mpc824x_eummbar_write (unsigned int regNum, unsigned int regVal)
+{
+	*(volatile unsigned int *) (EUMBBAR_VAL + regNum) = PCISWAP (regVal);
+	return;
+}
+
+/* ------------------------------------------------------------------------- */
diff --git a/cpu/mpc824x/interrupts.c b/cpu/mpc824x/interrupts.c
new file mode 100644
index 0000000..2011671
--- /dev/null
+++ b/cpu/mpc824x/interrupts.c
@@ -0,0 +1,185 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * Rob Taylor, Flying Pig Systems. robt@flyingpig.com
+ *
+ * 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 <mpc824x.h>
+#include <asm/processor.h>
+#include <asm/pci_io.h>
+#include <commproc.h>
+#include "drivers/epic.h"
+
+/****************************************************************************/
+
+unsigned decrementer_count;		/* count val for 1e6/HZ microseconds */
+
+static __inline__ unsigned long get_msr (void)
+{
+	unsigned long msr;
+
+	asm volatile ("mfmsr %0":"=r" (msr):);
+
+	return msr;
+}
+
+static __inline__ void set_msr (unsigned long msr)
+{
+	asm volatile ("mtmsr %0"::"r" (msr));
+}
+
+static __inline__ unsigned long get_dec (void)
+{
+	unsigned long val;
+
+	asm volatile ("mfdec %0":"=r" (val):);
+
+	return val;
+}
+
+
+static __inline__ void set_dec (unsigned long val)
+{
+	asm volatile ("mtdec %0"::"r" (val));
+}
+
+
+void enable_interrupts (void)
+{
+	set_msr (get_msr () | MSR_EE);
+}
+
+/* returns flag if MSR_EE was set before */
+int disable_interrupts (void)
+{
+	ulong msr = get_msr ();
+
+	set_msr (msr & ~MSR_EE);
+	return ((msr & MSR_EE) != 0);
+}
+
+/****************************************************************************/
+
+int interrupt_init (void)
+{
+	decrementer_count = (get_bus_freq (0) / 4) / CFG_HZ;
+
+        /*
+         * It's all broken at the moment and I currently don't need
+         * interrupts. If you want to fix it, have a look at the epic
+         * drivers in dink32 v12. They do everthing and Motorola said
+         * I could use the dink source in this project as long as
+         * copyright notices remain intact.
+	 */
+
+	epicInit (EPIC_DIRECT_IRQ, 0);
+
+	set_dec (decrementer_count);
+
+	set_msr (get_msr () | MSR_EE);
+
+	return (0);
+}
+
+/****************************************************************************/
+
+/*
+ * Handle external interrupts
+ */
+void external_interrupt (struct pt_regs *regs)
+{
+	register unsigned long temp;
+
+	pci_readl (CFG_EUMB_ADDR + EPIC_PROC_INT_ACK_REG, temp);
+	sync ();					/* i'm not convinced this is needed, but dink source has it */
+	temp &= 0xff;				/*get vector */
+
+	/*TODO: handle them -... */
+	epicEOI ();
+}
+
+/****************************************************************************/
+
+/*
+ * blank int handlers.
+ */
+
+void
+irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
+{
+}
+
+void irq_free_handler (int vec)
+{
+
+}
+
+/*TODO: some handlers for winbond and 87308 interrupts
+ and what about generic pci inteerupts?
+ vga?
+ */
+
+volatile ulong timestamp = 0;
+
+void timer_interrupt (struct pt_regs *regs)
+{
+	/* Restore Decrementer Count */
+	set_dec (decrementer_count);
+
+	timestamp++;
+
+#if defined(CONFIG_WATCHDOG)
+	if ((timestamp % (CFG_HZ / 2)) == 0) {
+#if defined(CONFIG_OXC)
+		{
+			extern void oxc_wdt_reset (void);
+
+			oxc_wdt_reset ();
+		}
+#endif
+	}
+#endif							/* CONFIG_WATCHDOG */
+#if defined(CONFIG_SHOW_ACTIVITY) && defined(CONFIG_OXC)
+	if ((timestamp % (CFG_HZ / 10)) == 0) {
+		{
+			extern void oxc_toggle_activeled (void);
+
+			oxc_toggle_activeled ();
+		}
+	}
+#endif
+}
+
+void reset_timer (void)
+{
+	timestamp = 0;
+}
+
+ulong get_timer (ulong base)
+{
+	return (timestamp - base);
+}
+
+void set_timer (ulong t)
+{
+	timestamp = t;
+}