Initial revision

2 files changed, 473 insertions, 0 deletions

diff --git a/cpu/ppc4xx/miiphy.c b/cpu/ppc4xx/miiphy.c
new file mode 100644
index 0000000000..51ba47111b
--- /dev/null
+++ b/cpu/ppc4xx/miiphy.c
@@ -0,0 +1,182 @@
+/*-----------------------------------------------------------------------------+
+  |
+  |       This source code has been made available to you by IBM on an AS-IS
+  |       basis.  Anyone receiving this source is licensed under IBM
+  |       copyrights to use it in any way he or she deems fit, including
+  |       copying it, modifying it, compiling it, and redistributing it either
+  |       with or without modifications.  No license under IBM patents or
+  |       patent applications is to be implied by the copyright license.
+  |
+  |       Any user of this software should understand that IBM cannot provide
+  |       technical support for this software and will not be responsible for
+  |       any consequences resulting from the use of this software.
+  |
+  |       Any person who transfers this source code or any derivative work
+  |       must include the IBM copyright notice, this paragraph, and the
+  |       preceding two paragraphs in the transferred software.
+  |
+  |       COPYRIGHT   I B M   CORPORATION 1995
+  |       LICENSED MATERIAL  -  PROGRAM PROPERTY OF I B M
+  +-----------------------------------------------------------------------------*/
+/*-----------------------------------------------------------------------------+
+  |
+  |  File Name:  miiphy.c
+  |
+  |  Function:   This module has utilities for accessing the MII PHY through
+  |	       the EMAC3 macro.
+  |
+  |  Author:     Mark Wisner
+  |
+  |  Change Activity-
+  |
+  |  Date        Description of Change                                       BY
+  |  ---------   ---------------------                                       ---
+  |  05-May-99   Created                                                     MKW
+  |  01-Jul-99   Changed clock setting of sta_reg from 66Mhz to 50Mhz to
+  |              better match OPB speed. Also modified delay times.      	   JWB
+  |  29-Jul-99   Added Full duplex support                                   MKW
+  |  24-Aug-99   Removed printf from dp83843_duplex()                      JWB
+  |  19-Jul-00   Ported to esd cpci405                                       sr
+  |
+  +-----------------------------------------------------------------------------*/
+
+#include <common.h>
+#include <asm/processor.h>
+#include <ppc_asm.tmpl>
+#include <commproc.h>
+#include <405gp_enet.h>
+#include <405_mal.h>
+#include <miiphy.h>
+
+#if defined(CONFIG_405GP) || defined(CONFIG_440)
+
+
+/***********************************************************/
+/* Dump out to the screen PHY regs                         */
+/***********************************************************/
+
+void miiphy_dump (unsigned char addr)
+{
+	unsigned long i;
+	unsigned short data;
+
+
+	for (i = 0; i < 0x1A; i++) {
+		if (miiphy_read (addr, i, &data)) {
+			printf ("read error for reg %lx\n", i);
+			return;
+		}
+		printf ("Phy reg %lx ==> %4x\n", i, data);
+
+		/* jump to the next set of regs */
+		if (i == 0x07)
+			i = 0x0f;
+
+	} /* end for loop */
+} /* end dump */
+
+
+
+/***********************************************************/
+/* read a phy reg and return the value with a rc           */
+/***********************************************************/
+
+int miiphy_read (unsigned char addr, unsigned char reg,
+				 unsigned short *value)
+{
+	unsigned long sta_reg;		/* STA scratch area */
+	unsigned long i;
+
+	/* see if it is ready for 1000 nsec */
+	i = 0;
+
+	/* see if it is ready for  sec */
+	while ((in32 (EMAC_STACR) & EMAC_STACR_OC) == 0) {
+		udelay (7);
+		if (i > 5) {
+			printf ("read err 1\n");
+			return -1;
+		}
+		i++;
+	}
+	sta_reg = reg;				/* reg address */
+	/* set clock (50Mhz) and read flags */
+	sta_reg = (sta_reg | EMAC_STACR_READ) & ~EMAC_STACR_CLK_100MHZ;
+	sta_reg = sta_reg | (addr << 5);	/* Phy address */
+
+	out32 (EMAC_STACR, sta_reg);
+#if 0	/* test-only */
+	printf ("a2: write: EMAC_STACR=0x%0x\n", sta_reg);	/* test-only */
+#endif
+
+	sta_reg = in32 (EMAC_STACR);
+	i = 0;
+	while ((sta_reg & EMAC_STACR_OC) == 0) {
+		udelay (7);
+		if (i > 5) {
+			printf ("read err 2\n");
+			return -1;
+		}
+		i++;
+		sta_reg = in32 (EMAC_STACR);
+	}
+	if ((sta_reg & EMAC_STACR_PHYE) != 0) {
+		printf ("read err 3\n");
+		printf ("a2: read: EMAC_STACR=0x%0lx, i=%d\n",
+			sta_reg, (int) i);	/* test-only */
+		return -1;
+	}
+
+	*value = *(short *) (&sta_reg);
+	return 0;
+
+
+} /* phy_read */
+
+
+/***********************************************************/
+/* write a phy reg and return the value with a rc           */
+/***********************************************************/
+
+int miiphy_write (unsigned char addr, unsigned char reg,
+		  unsigned short value)
+{
+	unsigned long sta_reg;		/* STA scratch area */
+	unsigned long i;
+
+	/* see if it is ready for 1000 nsec */
+	i = 0;
+
+	while ((in32 (EMAC_STACR) & EMAC_STACR_OC) == 0) {
+		if (i > 5)
+			return -1;
+		udelay (7);
+		i++;
+	}
+	sta_reg = 0;
+	sta_reg = reg;				/* reg address */
+	/* set clock (50Mhz) and read flags */
+	sta_reg = (sta_reg | EMAC_STACR_WRITE) & ~EMAC_STACR_CLK_100MHZ;
+	sta_reg = sta_reg | ((unsigned long) addr << 5);	/* Phy address */
+	memcpy (&sta_reg, &value, 2);	/* put in data */
+
+	out32 (EMAC_STACR, sta_reg);
+
+	/* wait for completion */
+	i = 0;
+	sta_reg = in32 (EMAC_STACR);
+	while ((sta_reg & EMAC_STACR_OC) == 0) {
+		udelay (7);
+		if (i > 5)
+			return -1;
+		i++;
+		sta_reg = in32 (EMAC_STACR);
+	}
+
+	if ((sta_reg & EMAC_STACR_PHYE) != 0)
+		return -1;
+	return 0;
+
+} /* phy_read */
+
+#endif	/* CONFIG_405GP */
diff --git a/cpu/ppc4xx/traps.c b/cpu/ppc4xx/traps.c
new file mode 100644
index 0000000000..85f2ea4cce
--- /dev/null
+++ b/cpu/ppc4xx/traps.c
@@ -0,0 +1,291 @@
+/*
+ * linux/arch/ppc/kernel/traps.c
+ *
+ * Copyright (C) 1995-1996  Gary Thomas (gdt@linuxppc.org)
+ *
+ * Modified by Cort Dougan (cort@cs.nmt.edu)
+ * and Paul Mackerras (paulus@cs.anu.edu.au)
+ *
+ * (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
+ */
+
+/*
+ * This file handles the architecture-dependent parts of hardware exceptions
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/processor.h>
+
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+int (*debugger_exception_handler)(struct pt_regs *) = 0;
+#endif
+
+/* Returns 0 if exception not found and fixup otherwise.  */
+extern unsigned long search_exception_table(unsigned long);
+
+/* THIS NEEDS CHANGING to use the board info structure.
+ */
+#define END_OF_MEM	0x00400000
+
+
+static __inline__ void set_tsr(unsigned long val)
+{
+#if defined(CONFIG_440)
+	asm volatile("mtspr 0x150, %0" : : "r" (val));
+#else
+	asm volatile("mttsr %0" : : "r" (val));
+#endif
+}
+
+static __inline__ unsigned long get_esr(void)
+{
+	unsigned long val;
+
+#if defined(CONFIG_440)
+	asm volatile("mfspr %0, 0x03e" : "=r" (val) :);
+#else
+	asm volatile("mfesr %0" : "=r" (val) :);
+#endif
+	return val;
+}
+
+#define ESR_MCI 0x80000000
+#define ESR_PIL 0x08000000
+#define ESR_PPR 0x04000000
+#define ESR_PTR 0x02000000
+#define ESR_DST 0x00800000
+#define ESR_DIZ 0x00400000
+#define ESR_U0F 0x00008000
+
+#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
+extern void do_bedbug_breakpoint(struct pt_regs *);
+#endif
+
+/*
+ * Trap & Exception support
+ */
+
+void
+print_backtrace(unsigned long *sp)
+{
+	int cnt = 0;
+	unsigned long i;
+
+	printf("Call backtrace: ");
+	while (sp) {
+		if ((uint)sp > END_OF_MEM)
+			break;
+
+		i = sp[1];
+		if (cnt++ % 7 == 0)
+			printf("\n");
+		printf("%08lX ", i);
+		if (cnt > 32) break;
+		sp = (unsigned long *)*sp;
+	}
+	printf("\n");
+}
+
+void show_regs(struct pt_regs * regs)
+{
+	int i;
+
+	printf("NIP: %08lX XER: %08lX LR: %08lX REGS: %p TRAP: %04lx DAR: %08lX\n",
+	       regs->nip, regs->xer, regs->link, regs, regs->trap, regs->dar);
+	printf("MSR: %08lx EE: %01x PR: %01x FP: %01x ME: %01x IR/DR: %01x%01x\n",
+	       regs->msr, regs->msr&MSR_EE ? 1 : 0, regs->msr&MSR_PR ? 1 : 0,
+	       regs->msr & MSR_FP ? 1 : 0,regs->msr&MSR_ME ? 1 : 0,
+	       regs->msr&MSR_IR ? 1 : 0,
+	       regs->msr&MSR_DR ? 1 : 0);
+
+	printf("\n");
+	for (i = 0;  i < 32;  i++) {
+		if ((i % 8) == 0)
+		{
+			printf("GPR%02d: ", i);
+		}
+
+		printf("%08lX ", regs->gpr[i]);
+		if ((i % 8) == 7)
+		{
+			printf("\n");
+		}
+	}
+}
+
+
+void
+_exception(int signr, struct pt_regs *regs)
+{
+	show_regs(regs);
+	print_backtrace((unsigned long *)regs->gpr[1]);
+	panic("Exception in kernel pc %lx signal %d",regs->nip,signr);
+}
+
+void
+MachineCheckException(struct pt_regs *regs)
+{
+	unsigned long fixup;
+
+	/* Probing PCI using config cycles cause this exception
+	 * when a device is not present.  Catch it and return to
+	 * the PCI exception handler.
+	 */
+	if ((fixup = search_exception_table(regs->nip)) != 0) {
+		regs->nip = fixup;
+		return;
+	}
+
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+
+	printf("Machine check in kernel mode.\n");
+	printf("Caused by (from msr): ");
+	printf("regs %p ",regs);
+	switch( regs->msr & 0x0000F000)
+	{
+	case (1<<12) :
+		printf("Machine check signal - probably due to mm fault\n"
+		       "with mmu off\n");
+		break;
+	case (1<<13) :
+		printf("Transfer error ack signal\n");
+		break;
+	case (1<<14) :
+		printf("Data parity signal\n");
+		break;
+	case (1<<15) :
+		printf("Address parity signal\n");
+		break;
+	default:
+		printf("Unknown values in msr\n");
+	}
+	show_regs(regs);
+	print_backtrace((unsigned long *)regs->gpr[1]);
+	panic("machine check");
+}
+
+void
+AlignmentException(struct pt_regs *regs)
+{
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+
+	show_regs(regs);
+	print_backtrace((unsigned long *)regs->gpr[1]);
+	panic("Alignment Exception");
+}
+
+void
+ProgramCheckException(struct pt_regs *regs)
+{
+        long esr_val;
+
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+
+	show_regs(regs);
+
+        esr_val = get_esr();
+        if( esr_val & ESR_PIL )
+		printf( "** Illegal Instruction **\n" );
+        else if( esr_val & ESR_PPR )
+		printf( "** Privileged Instruction **\n" );
+        else if( esr_val & ESR_PTR )
+		printf( "** Trap Instruction **\n" );
+
+	print_backtrace((unsigned long *)regs->gpr[1]);
+	panic("Program Check Exception");
+}
+
+void
+PITException(struct pt_regs *regs)
+{
+        /*
+         * Reset PIT interrupt
+         */
+        set_tsr(0x08000000);
+
+        /*
+         * Call timer_interrupt routine in interrupts.c
+         */
+        timer_interrupt(NULL);
+}
+
+
+void
+UnknownException(struct pt_regs *regs)
+{
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+
+	printf("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
+	       regs->nip, regs->msr, regs->trap);
+	_exception(0, regs);
+}
+
+void
+DebugException(struct pt_regs *regs)
+{
+	printf("Debugger trap at @ %lx\n", regs->nip );
+	show_regs(regs);
+#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
+	do_bedbug_breakpoint( regs );
+#endif
+}
+
+/* Probe an address by reading.  If not present, return -1, otherwise
+ * return 0.
+ */
+int
+addr_probe(uint *addr)
+{
+#if 0
+	int	retval;
+
+	__asm__ __volatile__(			\
+		"1:	lwz %0,0(%1)\n"		\
+						"	eieio\n"		\
+						"	li %0,0\n"		\
+						"2:\n"				\
+						".section .fixup,\"ax\"\n"	\
+						"3:	li %0,-1\n"		\
+						"	b 2b\n"			\
+						".section __ex_table,\"a\"\n"	\
+						"	.align 2\n"		\
+						"	.long 1b,3b\n"		\
+						".text"				\
+						: "=r" (retval) : "r"(addr));
+
+	return (retval);
+#endif
+	return 0;
+}