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-rw-r--r--cpu/mpc5xx/Makefile52
-rw-r--r--cpu/mpc5xx/config.mk34
-rw-r--r--cpu/mpc5xx/cpu.c155
-rw-r--r--cpu/mpc5xx/cpu_init.c119
-rw-r--r--cpu/mpc5xx/interrupts.c273
-rw-r--r--cpu/mpc5xx/serial.c171
-rw-r--r--cpu/mpc5xx/speed.c66
-rw-r--r--cpu/mpc5xx/start.S629
-rw-r--r--cpu/mpc5xx/status_led.c161
-rw-r--r--cpu/mpc5xx/traps.c231
10 files changed, 1891 insertions, 0 deletions
diff --git a/cpu/mpc5xx/Makefile b/cpu/mpc5xx/Makefile
new file mode 100644
index 0000000..a1e0421
--- /dev/null
+++ b/cpu/mpc5xx/Makefile
@@ -0,0 +1,52 @@
+#
+# (C) Copyright 2003
+# Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+#
+# 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
+#
+
+#
+# File: cpu/mpc5xx/Makefile
+#
+# Discription: Makefile to build mpc5xx cpu configuration.
+# Will include top config.mk which itselfs
+# uses the definitions made in cpu/mpc5xx/config.mk
+#
+
+
+include $(TOPDIR)/config.mk
+
+LIB = lib$(CPU).a
+
+START = start.S
+OBJS = serial.o cpu.o cpu_init.o interrupts.o traps.o speed.o status_led.o
+
+all: .depend $(START) $(LIB)
+
+$(LIB): $(OBJS)
+ $(AR) crv $@ $(OBJS)
+
+#########################################################################
+
+.depend: Makefile $(START:.o=.S) $(OBJS:.o=.c)
+ $(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
diff --git a/cpu/mpc5xx/config.mk b/cpu/mpc5xx/config.mk
new file mode 100644
index 0000000..d302d48
--- /dev/null
+++ b/cpu/mpc5xx/config.mk
@@ -0,0 +1,34 @@
+#
+# (C) Copyright 2003
+# Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+#
+# 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
+#
+
+#
+# File: config.mk
+#
+# Discription: compiler flags and make definitions
+#
+
+
+PLATFORM_RELFLAGS += -mrelocatable -ffixed-r14 -meabi
+
+PLATFORM_CPPFLAGS += -DCONFIG_5xx -ffixed-r2 -ffixed-r29 -mpowerpc -msoft-float
+
diff --git a/cpu/mpc5xx/cpu.c b/cpu/mpc5xx/cpu.c
new file mode 100644
index 0000000..6018436
--- /dev/null
+++ b/cpu/mpc5xx/cpu.c
@@ -0,0 +1,155 @@
+/*
+ * (C) Copyright 2003
+ * Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+ *
+ * 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,
+ */
+
+/*
+ * File: cpu.c
+ *
+ * Discription: Some cpu specific function for watchdog,
+ * cpu version test, clock setting ...
+ *
+ */
+
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <mpc5xx.h>
+
+
+#if (defined(CONFIG_MPC555))
+# define ID_STR "MPC555/556"
+
+/*
+ * Check version of cpu with Processor Version Register (PVR)
+ */
+static int check_cpu_version (long clock, uint pvr, uint immr)
+{
+ char buf[32];
+ /* The highest 16 bits should be 0x0002 for a MPC555/556 */
+ if ((pvr >> 16) == 0x0002) {
+ printf (" " ID_STR " Version %x", (pvr >> 16));
+ printf (" at %s MHz:", strmhz (buf, clock));
+ } else {
+ printf ("Not supported cpu version");
+ return -1;
+ }
+ return 0;
+}
+#endif /* CONFIG_MPC555 */
+
+
+/*
+ * Check version of mpc5xx
+ */
+int checkcpu (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ ulong clock = gd->cpu_clk;
+ uint immr = get_immr (0); /* Return full IMMR contents */
+ uint pvr = get_pvr (); /* Retrieve PVR register */
+
+ puts ("CPU: ");
+
+ return check_cpu_version (clock, pvr, immr);
+}
+
+/*
+ * Called by macro WATCHDOG_RESET
+ */
+#if defined(CONFIG_WATCHDOG)
+void watchdog_reset (void)
+{
+ int re_enable = disable_interrupts ();
+
+ reset_5xx_watchdog ((immap_t *) CFG_IMMR);
+ if (re_enable)
+ enable_interrupts ();
+}
+
+/*
+ * Will clear software reset
+ */
+void reset_5xx_watchdog (volatile immap_t * immr)
+{
+ /* Use the MPC5xx Internal Watchdog */
+ immr->im_siu_conf.sc_swsr = 0x556c; /* Prevent SW time-out */
+ immr->im_siu_conf.sc_swsr = 0xaa39;
+}
+
+#endif /* CONFIG_WATCHDOG */
+
+
+/*
+ * Get timebase clock frequency
+ */
+unsigned long get_tbclk (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+ volatile immap_t *immr = (volatile immap_t *) CFG_IMMR;
+ ulong oscclk, factor;
+
+ if (immr->im_clkrst.car_sccr & SCCR_TBS) {
+ return (gd->cpu_clk / 16);
+ }
+
+ factor = (((CFG_PLPRCR) & PLPRCR_MF_MSK) >> PLPRCR_MF_SHIFT) + 1;
+
+ oscclk = gd->cpu_clk / factor;
+
+ if ((immr->im_clkrst.car_sccr & SCCR_RTSEL) == 0 || factor > 2) {
+ return (oscclk / 4);
+ }
+ return (oscclk / 16);
+}
+
+
+/*
+ * Reset board
+ */
+int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+ ulong addr;
+
+ /* Interrupts off, enable reset */
+ __asm__ volatile (" mtspr 81, %r0 \n\t
+ mfmsr %r3 \n\t
+ rlwinm %r31,%r3,0,25,23\n\t
+ mtmsr %r31 \n\t");
+ /*
+ * 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;
+}
+
diff --git a/cpu/mpc5xx/cpu_init.c b/cpu/mpc5xx/cpu_init.c
new file mode 100644
index 0000000..27cf3d6
--- /dev/null
+++ b/cpu/mpc5xx/cpu_init.c
@@ -0,0 +1,119 @@
+/*
+ * (C) Copyright 2003 Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+ *
+ * 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,
+ */
+
+/*
+ * File: cpu_init.c
+ *
+ * Discription: Contains initialisation functions to setup
+ * the cpu properly
+ *
+ */
+
+#include <common.h>
+#include <mpc5xx.h>
+#include <watchdog.h>
+
+/*
+ * Setup essential cpu registers to run
+ */
+void cpu_init_f (volatile immap_t * immr)
+{
+ volatile memctl5xx_t *memctl = &immr->im_memctl;
+ ulong reg;
+
+ /* SYPCR - contains watchdog control. This will enable watchdog */
+ /* if CONFIG_WATCHDOG is set */
+ immr->im_siu_conf.sc_sypcr = CFG_SYPCR;
+
+#if defined(CONFIG_WATCHDOG)
+ reset_5xx_watchdog (immr);
+#endif
+
+ /* SIUMCR - contains debug pin configuration */
+ immr->im_siu_conf.sc_siumcr |= CFG_SIUMCR;
+
+ /* Initialize timebase. Unlock TBSCRK */
+ immr->im_sitk.sitk_tbscrk = KAPWR_KEY;
+ immr->im_sit.sit_tbscr = CFG_TBSCR;
+
+ /* Full IMB bus speed */
+ immr->im_uimb.uimb_umcr = CFG_UMCR;
+
+ /* Time base and decrementer will be enables (TBE) */
+ /* in init_timebase() in time.c called from board_init_f(). */
+
+ /* Initialize the PIT. Unlock PISCRK */
+ immr->im_sitk.sitk_piscrk = KAPWR_KEY;
+ immr->im_sit.sit_piscr = CFG_PISCR;
+
+ /* PLL (CPU clock) settings */
+ immr->im_clkrstk.cark_plprcrk = KAPWR_KEY;
+
+ /* If CFG_PLPRCR (set in the various *_config.h files) tries to
+ * set the MF field, then just copy CFG_PLPRCR over car_plprcr,
+ * otherwise OR in CFG_PLPRCR so we do not change the currentMF
+ * field value.
+ */
+#if ((CFG_PLPRCR & PLPRCR_MF_MSK) != 0)
+ reg = CFG_PLPRCR; /* reset control bits */
+#else
+ reg = immr->im_clkrst.car_plprcr;
+ reg &= PLPRCR_MF_MSK; /* isolate MF field */
+ reg |= CFG_PLPRCR; /* reset control bits */
+#endif
+ immr->im_clkrst.car_plprcr = reg;
+
+ /* System integration timers. CFG_MASK has EBDF configuration */
+ immr->im_clkrstk.cark_sccrk = KAPWR_KEY;
+ reg = immr->im_clkrst.car_sccr;
+ reg &= SCCR_MASK;
+ reg |= CFG_SCCR;
+ immr->im_clkrst.car_sccr = reg;
+
+ /* Memory Controller */
+ memctl->memc_br0 = CFG_BR0_PRELIM;
+ memctl->memc_or0 = CFG_OR0_PRELIM;
+
+#if (defined(CFG_OR1_PRELIM) && defined(CFG_BR1_PRELIM))
+ memctl->memc_or1 = CFG_OR1_PRELIM;
+ memctl->memc_br1 = CFG_BR1_PRELIM;
+#endif
+
+#if defined(CFG_OR2_PRELIM) && defined(CFG_BR2_PRELIM)
+ memctl->memc_or2 = CFG_OR2_PRELIM;
+ memctl->memc_br2 = CFG_BR2_PRELIM;
+#endif
+
+#if defined(CFG_OR3_PRELIM) && defined(CFG_BR3_PRELIM)
+ memctl->memc_or3 = CFG_OR3_PRELIM;
+ memctl->memc_br3 = CFG_BR3_PRELIM;
+#endif
+
+}
+
+/*
+ * Initialize higher level parts of cpu
+ */
+int cpu_init_r (void)
+{
+ /* Nothing to do at the moment */
+ return (0);
+}
diff --git a/cpu/mpc5xx/interrupts.c b/cpu/mpc5xx/interrupts.c
new file mode 100644
index 0000000..282c316
--- /dev/null
+++ b/cpu/mpc5xx/interrupts.c
@@ -0,0 +1,273 @@
+/*
+ * (C) Copyright 2000-2002 Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * (C) Copyright 2003 Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+ *
+ * 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,
+ */
+
+/*
+ * File: interrupt.c
+ *
+ * Discription: Contains interrupt routines needed by U-Boot
+ *
+ */
+
+#include <common.h>
+#include <watchdog.h>
+#include <mpc5xx.h>
+#include <asm/processor.h>
+
+/************************************************************************/
+
+unsigned decrementer_count; /* count value for 1e6/HZ microseconds */
+
+/************************************************************************/
+
+struct interrupt_action {
+ interrupt_handler_t *handler;
+ void *arg;
+};
+
+static struct interrupt_action irq_vecs[NR_IRQS];
+
+/*
+ * Local function prototypes
+ */
+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));
+}
+
+/*
+ * Enable interrupts
+ */
+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);
+}
+
+/*
+ * Initialise interrupts
+ */
+
+int interrupt_init (void)
+{
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+
+ /* Decrementer used here for status led */
+ decrementer_count = get_tbclk () / CFG_HZ;
+
+ /* Disable all interrupts */
+ immr->im_siu_conf.sc_simask = 0;
+
+ set_dec (decrementer_count);
+
+ set_msr (get_msr () | MSR_EE);
+ return (0);
+}
+
+/*
+ * Handle external interrupts
+ */
+void external_interrupt (struct pt_regs *regs)
+{
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+ int irq;
+ ulong simask, newmask;
+ ulong vec, v_bit;
+
+ /*
+ * read the SIVEC register and shift the bits down
+ * to get the irq number
+ */
+ vec = immr->im_siu_conf.sc_sivec;
+ irq = vec >> 26;
+ v_bit = 0x80000000UL >> irq;
+
+ /*
+ * Read Interrupt Mask Register and Mask Interrupts
+ */
+ simask = immr->im_siu_conf.sc_simask;
+ newmask = simask & (~(0xFFFF0000 >> irq));
+ immr->im_siu_conf.sc_simask = newmask;
+
+ if (!(irq & 0x1)) { /* External Interrupt ? */
+ ulong siel;
+
+ /*
+ * Read Interrupt Edge/Level Register
+ */
+ siel = immr->im_siu_conf.sc_siel;
+
+ if (siel & v_bit) { /* edge triggered interrupt ? */
+ /*
+ * Rewrite SIPEND Register to clear interrupt
+ */
+ immr->im_siu_conf.sc_sipend = v_bit;
+ }
+ }
+
+ if (irq_vecs[irq].handler != NULL) {
+ irq_vecs[irq].handler (irq_vecs[irq].arg);
+ } else {
+ printf ("\nBogus External Interrupt IRQ %d Vector %ld\n",
+ irq, vec);
+ /* turn off the bogus interrupt to avoid it from now */
+ simask &= ~v_bit;
+ }
+ /*
+ * Re-Enable old Interrupt Mask
+ */
+ immr->im_siu_conf.sc_simask = simask;
+}
+
+/*
+ * Install and free an interrupt handler
+ */
+void irq_install_handler (int vec, interrupt_handler_t * handler,
+ void *arg)
+{
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+ /* SIU interrupt */
+ if (irq_vecs[vec].handler != NULL) {
+ printf ("SIU interrupt %d 0x%x\n",
+ vec,
+ (uint) handler);
+ }
+ irq_vecs[vec].handler = handler;
+ irq_vecs[vec].arg = arg;
+ immr->im_siu_conf.sc_simask |= 1 << (31 - vec);
+#if 0
+ printf ("Install SIU interrupt for vector %d ==> %p\n",
+ vec, handler);
+#endif
+}
+
+void irq_free_handler (int vec)
+{
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+ /* SIU interrupt */
+#if 0
+ printf ("Free CPM interrupt for vector %d\n",
+ vec);
+#endif
+ immr->im_siu_conf.sc_simask &= ~(1 << (31 - vec));
+ irq_vecs[vec].handler = NULL;
+ irq_vecs[vec].arg = NULL;
+}
+
+volatile ulong timestamp = 0;
+
+/*
+ * Timer interrupt - gets called when bit 0 of DEC changes from
+ * 0. Decrementer is enabled with bit TBE in TBSCR.
+ */
+void timer_interrupt (struct pt_regs *regs)
+{
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+
+#ifdef CONFIG_STATUS_LED
+ extern void status_led_tick (ulong);
+#endif
+#if 0
+ printf ("*** Timer Interrupt *** ");
+#endif
+ /* Reset Timer Status Bit and Timers Interrupt Status */
+ immr->im_clkrstk.cark_plprcrk = KAPWR_KEY;
+ __asm__ ("nop");
+ immr->im_clkrst.car_plprcr |= PLPRCR_TEXPS | PLPRCR_TMIST;
+
+ /* Restore Decrementer Count */
+ set_dec (decrementer_count);
+
+ timestamp++;
+
+#ifdef CONFIG_STATUS_LED
+ status_led_tick (timestamp);
+#endif /* CONFIG_STATUS_LED */
+
+#if defined(CONFIG_WATCHDOG)
+ /*
+ * The shortest watchdog period of all boards
+ * is approx. 1 sec, thus re-trigger watchdog at least
+ * every 500 ms = CFG_HZ / 2
+ */
+ if ((timestamp % (CFG_HZ / 2)) == 0) {
+ reset_5xx_watchdog (immr);
+ }
+#endif /* CONFIG_WATCHDOG */
+}
+
+/*
+ * Reset timer
+ */
+void reset_timer (void)
+{
+ timestamp = 0;
+}
+
+/*
+ * Get Timer
+ */
+ulong get_timer (ulong base)
+{
+ return (timestamp - base);
+}
+
+/*
+ * Set timer
+ */
+void set_timer (ulong t)
+{
+ timestamp = t;
+}
diff --git a/cpu/mpc5xx/serial.c b/cpu/mpc5xx/serial.c
new file mode 100644
index 0000000..738c275
--- /dev/null
+++ b/cpu/mpc5xx/serial.c
@@ -0,0 +1,171 @@
+/*
+ * (C) Copyright 2003
+ * Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+ *
+ * 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,
+ */
+
+/*
+ * File: serial.c
+ *
+ * Discription: Serial interface driver for SCI1 and SCI2.
+ * Since this code will be called from ROM use
+ * only non-static local variables.
+ *
+ */
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <mpc5xx.h>
+
+
+/*
+ * Local function prototypes
+ */
+
+static int ready_to_send(void);
+
+/*
+ * Minimal global serial functions needed to use one of the SCI modules.
+ */
+
+int serial_init (void)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+
+ serial_setbrg();
+
+#if defined(CONFIG_5xx_CONS_SCI1)
+ /* 10-Bit, 1 start bit, 8 data bit, no parity, 1 stop bit */
+ immr->im_qsmcm.qsmcm_scc1r1 = SCI_M_10;
+ immr->im_qsmcm.qsmcm_scc1r1 = SCI_TE | SCI_RE;
+#else
+ immr->im_qsmcm.qsmcm_scc2r1 = SCI_M_10;
+ immr->im_qsmcm.qsmcm_scc2r1 = SCI_TE | SCI_RE;
+#endif
+ return 0;
+}
+
+void serial_putc(const char c)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+
+ /* Test for completition */
+ if(ready_to_send()) {
+#if defined(CONFIG_5xx_CONS_SCI1)
+ immr->im_qsmcm.qsmcm_sc1dr = (short)c;
+#else
+ immr->im_qsmcm.qsmcm_sc2dr = (short)c;
+#endif
+ if(c == '\n') {
+ if(ready_to_send());
+#if defined(CONFIG_5xx_CONS_SCI1)
+ immr->im_qsmcm.qsmcm_sc1dr = (short)'\r';
+#else
+ immr->im_qsmcm.qsmcm_sc2dr = (short)'\r';
+#endif
+ }
+ }
+}
+
+int serial_getc(void)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ volatile short status;
+ unsigned char tmp;
+
+ /* New data ? */
+ do {
+#if defined(CONFIG_5xx_CONS_SCI1)
+ status = immr->im_qsmcm.qsmcm_sc1sr;
+#else
+ status = immr->im_qsmcm.qsmcm_sc2sr;
+#endif
+
+#if defined(CONFIG_WATCHDOG)
+ reset_5xx_watchdog (immr);
+#endif
+ } while ((status & SCI_RDRF) == 0);
+
+ /* Read data */
+#if defined(CONFIG_5xx_CONS_SCI1)
+ tmp = (unsigned char)(immr->im_qsmcm.qsmcm_sc1dr & SCI_SCXDR_MK);
+#else
+ tmp = (unsigned char)( immr->im_qsmcm.qsmcm_sc2dr & SCI_SCXDR_MK);
+#endif
+ return tmp;
+}
+
+int serial_tstc()
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ short status;
+
+ /* New data character ? */
+#if defined(CONFIG_5xx_CONS_SCI1)
+ status = immr->im_qsmcm.qsmcm_sc1sr;
+#else
+ status = immr->im_qsmcm.qsmcm_sc2sr;
+#endif
+ return (status & SCI_RDRF);
+}
+
+void serial_setbrg (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ short scxbr;
+
+ /* Set baudrate */
+ scxbr = (gd->cpu_clk / (32 * gd->baudrate));
+#if defined(CONFIG_5xx_CONS_SCI1)
+ immr->im_qsmcm.qsmcm_scc1r0 = (scxbr & SCI_SCXBR_MK);
+#else
+ immr->im_qsmcm.qsmcm_scc2r0 = (scxbr & SCI_SCXBR_MK);
+#endif
+}
+
+void serial_puts (const char *s)
+{
+ while (*s) {
+ serial_putc(*s);
+ ++s;
+ }
+}
+
+int ready_to_send(void)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ volatile short status;
+
+ do {
+#if defined(CONFIG_5xx_CONS_SCI1)
+ status = immr->im_qsmcm.qsmcm_sc1sr;
+#else
+ status = immr->im_qsmcm.qsmcm_sc2sr;
+#endif
+
+#if defined(CONFIG_WATCHDOG)
+ reset_5xx_watchdog (immr);
+#endif
+ } while ((status & SCI_TDRE) == 0);
+ return 1;
+
+}
+
diff --git a/cpu/mpc5xx/speed.c b/cpu/mpc5xx/speed.c
new file mode 100644
index 0000000..8098c99
--- /dev/null
+++ b/cpu/mpc5xx/speed.c
@@ -0,0 +1,66 @@
+/*
+ * (C) Copyright 2003
+ * Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+ *
+ * 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,
+ */
+
+/*
+ * File: speed.c
+ *
+ * Discription: Provides cpu speed calculation
+ *
+ */
+
+#include <common.h>
+#include <mpc5xx.h>
+#include <asm/processor.h>
+
+/*
+ * Get cpu and bus clock
+ */
+int get_clocks (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+
+#ifndef CONFIG_5xx_GCLK_FREQ
+ uint divf = (immr->im_clkrst.car_plprcr & PLPRCR_DIVF_MSK);
+ uint mf = ((immr->im_clkrst.car_plprcr & PLPRCR_MF_MSK) >> PLPRCR_MF_SHIFT);
+ ulong vcoout;
+
+ vcoout = (CFG_OSC_CLK / (divf + 1)) * (mf + 1) * 2;
+ if(immr->im_clkrst.car_plprcr & PLPRCR_CSRC_MSK) {
+ gd->cpu_clk = vcoout / (2^(((immr->im_clkrst.car_sccr & SCCR_DFNL_MSK) >> SCCR_DFNL_SHIFT) + 1));
+ } else {
+ gd->cpu_clk = vcoout / (2^(immr->im_clkrst.car_sccr & SCCR_DFNH_MSK));
+ }
+
+#else /* CONFIG_5xx_GCLK_FREQ */
+ gd->bus_clk = CONFIG_5xx_GCLK_FREQ;
+#endif /* CONFIG_5xx_GCLK_FREQ */
+
+ if ((immr->im_clkrst.car_sccr & SCCR_EBDF11) == 0) {
+ /* No Bus Divider active */
+ gd->bus_clk = gd->cpu_clk;
+ } else {
+ /* CLKOUT is GCLK / 2 */
+ gd->bus_clk = gd->cpu_clk / 2;
+ }
+ return (0);
+}
diff --git a/cpu/mpc5xx/start.S b/cpu/mpc5xx/start.S
new file mode 100644
index 0000000..d17fe92
--- /dev/null
+++ b/cpu/mpc5xx/start.S
@@ -0,0 +1,629 @@
+/*
+ * Copyright (C) 1998 Dan Malek <dmalek@jlc.net>
+ * Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
+ * Copyright (C) 2000, 2001, 2002 Wolfgang Denk <wd@denx.de>
+ * Copyright (C) 2003 Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+ *
+ * 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
+ */
+
+/*
+ * File: start.S
+ *
+ * Discription: startup code
+ *
+ */
+
+#include <config.h>
+#include <mpc5xx.h>
+#include <version.h>
+
+#define CONFIG_5xx 1 /* needed for Linux kernel header files */
+#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#include <linux/config.h>
+#include <asm/processor.h>
+
+#ifndef CONFIG_IDENT_STRING
+#define CONFIG_IDENT_STRING ""
+#endif
+
+/* We don't have a MMU.
+*/
+#undef MSR_KERNEL
+#define MSR_KERNEL ( MSR_ME | MSR_RI ) /* Machine Check and Recoverable Interr. */
+
+/*
+ * Set up GOT: Global Offset Table
+ *
+ * Use r14 to access the GOT
+ */
+ START_GOT
+ GOT_ENTRY(_GOT2_TABLE_)
+ GOT_ENTRY(_FIXUP_TABLE_)
+
+ GOT_ENTRY(_start)
+ GOT_ENTRY(_start_of_vectors)
+ GOT_ENTRY(_end_of_vectors)
+ GOT_ENTRY(transfer_to_handler)
+
+ GOT_ENTRY(_end)
+ GOT_ENTRY(.bss)
+ END_GOT
+
+/*
+ * r3 - 1st arg to board_init(): IMMP pointer
+ * r4 - 2nd arg to board_init(): boot flag
+ */
+ .text
+ .long 0x27051956 /* U-Boot Magic Number */
+ .globl version_string
+version_string:
+ .ascii U_BOOT_VERSION
+ .ascii " (", __DATE__, " - ", __TIME__, ")"
+ .ascii CONFIG_IDENT_STRING, "\0"
+
+ . = EXC_OFF_SYS_RESET
+ .globl _start
+_start:
+ mfspr r3, 638
+ li r4, CFG_ISB /* Set ISB bit */
+ or r3, r3, r4
+ mtspr 638, r3
+ li r21, BOOTFLAG_COLD /* Normal Power-On: Boot from FLASH */
+ b boot_cold
+
+ . = EXC_OFF_SYS_RESET + 0x20
+
+ .globl _start_warm
+_start_warm:
+ li r21, BOOTFLAG_WARM /* Software reboot */
+ b boot_warm
+
+boot_cold:
+boot_warm:
+
+ /* Initialize machine status; enable machine check interrupt */
+ /*----------------------------------------------------------------------*/
+ li r3, MSR_KERNEL /* Set ME, RI flags */
+ mtmsr r3
+ mtspr SRR1, r3 /* Make SRR1 match MSR */
+
+ /* Initialize debug port registers */
+ /*----------------------------------------------------------------------*/
+ xor r0, r0, r0 /* Clear R0 */
+ mtspr LCTRL1, r0 /* Initialize debug port regs */
+ mtspr LCTRL2, r0
+ mtspr COUNTA, r0
+ mtspr COUNTB, r0
+
+ /*
+ * Calculate absolute address in FLASH and jump there
+ *----------------------------------------------------------------------*/
+
+ lis r3, CFG_MONITOR_BASE@h
+ ori r3, r3, CFG_MONITOR_BASE@l
+ addi r3, r3, in_flash - _start + EXC_OFF_SYS_RESET
+ mtlr r3
+ blr
+
+in_flash:
+
+ /* Initialize some SPRs that are hard to access from C */
+ /*----------------------------------------------------------------------*/
+
+ lis r3, CFG_IMMR@h /* Pass IMMR as arg1 to C routine */
+ lis r2, CFG_INIT_SP_ADDR@h
+ ori r1, r2, CFG_INIT_SP_ADDR@l /* Set up the stack in internal SRAM */
+ /* Note: R0 is still 0 here */
+ stwu r0, -4(r1) /* Clear final stack frame so that */
+ stwu r0, -4(r1) /* stack backtraces terminate cleanly */
+
+ /*
+ * Disable serialized ifetch and show cycles
+ * (i.e. set processor to normal mode) for maximum
+ * performance.
+ */
+
+ li r2, 0x0007
+ mtspr ICTRL, r2
+
+ /* Set up debug mode entry */
+
+ lis r2, CFG_DER@h
+ ori r2, r2, CFG_DER@l
+ mtspr DER, r2
+
+ /* Let the C-code set up the rest */
+ /* */
+ /* Be careful to keep code relocatable ! */
+ /*----------------------------------------------------------------------*/
+
+ GET_GOT /* initialize GOT access */
+
+ /* r3: IMMR */
+ bl cpu_init_f /* run low-level CPU init code (from Flash) */
+
+ mr r3, r21
+ /* r3: BOOTFLAG */
+ bl board_init_f /* run 1st part of board init code (from Flash) */
+
+
+
+ .globl _start_of_vectors
+_start_of_vectors:
+
+/* Machine check */
+ STD_EXCEPTION(0x200, MachineCheck, MachineCheckException)
+
+/* Data Storage exception. "Never" generated on the 860. */
+ STD_EXCEPTION(0x300, DataStorage, UnknownException)
+
+/* Instruction Storage exception. "Never" generated on the 860. */
+ STD_EXCEPTION(0x400, InstStorage, UnknownException)
+
+/* External Interrupt exception. */
+ STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
+
+/* Alignment exception. */
+ . = 0x600
+Alignment:
+ EXCEPTION_PROLOG
+ mfspr r4,DAR
+ stw r4,_DAR(r21)
+ mfspr r5,DSISR
+ stw r5,_DSISR(r21)
+ addi r3,r1,STACK_FRAME_OVERHEAD
+ li r20,MSR_KERNEL
+ rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
+ lwz r6,GOT(transfer_to_handler)
+ mtlr r6
+ blrl
+.L_Alignment:
+ .long AlignmentException - _start + EXC_OFF_SYS_RESET
+ .long int_return - _start + EXC_OFF_SYS_RESET
+
+/* Program check exception */
+ . = 0x700
+ProgramCheck:
+ EXCEPTION_PROLOG
+ addi r3,r1,STACK_FRAME_OVERHEAD
+ li r20,MSR_KERNEL
+ rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
+ lwz r6,GOT(transfer_to_handler)
+ mtlr r6
+ blrl
+.L_ProgramCheck:
+ .long ProgramCheckException - _start + EXC_OFF_SYS_RESET
+ .long int_return - _start + EXC_OFF_SYS_RESET
+
+ /* FPU on MPC5xx available. We will use it later.
+ */
+ STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
+
+ /* I guess we could implement decrementer, and may have
+ * to someday for timekeeping.
+ */
+ STD_EXCEPTION(0x900, Decrementer, timer_interrupt)
+ STD_EXCEPTION(0xa00, Trap_0a, UnknownException)
+ STD_EXCEPTION(0xb00, Trap_0b, UnknownException)
+
+ . = 0xc00
+/*
+ * r0 - SYSCALL number
+ * r3-... arguments
+ */
+SystemCall:
+ addis r11,r0,0 /* get functions table addr */
+ ori r11,r11,0 /* Note: this code is patched in trap_init */
+ addis r12,r0,0 /* get number of functions */
+ ori r12,r12,0
+
+ cmplw 0, r0, r12
+ bge 1f
+
+ rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */
+ add r11,r11,r0
+ lwz r11,0(r11)
+
+ li r20,0xd00-4 /* Get stack pointer */
+ lwz r12,0(r20)
+ subi r12,r12,12 /* Adjust stack pointer */
+ li r0,0xc00+_end_back-SystemCall
+ cmplw 0, r0, r12 /* Check stack overflow */
+ bgt 1f
+ stw r12,0(r20)
+
+ mflr r0
+ stw r0,0(r12)
+ mfspr r0,SRR0
+ stw r0,4(r12)
+ mfspr r0,SRR1
+ stw r0,8(r12)
+
+ li r12,0xc00+_back-SystemCall
+ mtlr r12
+ mtspr SRR0,r11
+
+1: SYNC
+ rfi
+
+_back:
+
+ mfmsr r11 /* Disable interrupts */
+ li r12,0
+ ori r12,r12,MSR_EE
+ andc r11,r11,r12
+ SYNC /* Some chip revs need this... */
+ mtmsr r11
+ SYNC
+
+ li r12,0xd00-4 /* restore regs */
+ lwz r12,0(r12)
+
+ lwz r11,0(r12)
+ mtlr r11
+ lwz r11,4(r12)
+ mtspr SRR0,r11
+ lwz r11,8(r12)
+ mtspr SRR1,r11
+
+ addi r12,r12,12 /* Adjust stack pointer */
+ li r20,0xd00-4
+ stw r12,0(r20)
+
+ SYNC
+ rfi
+_end_back:
+
+ STD_EXCEPTION(0xd00, SingleStep, UnknownException)
+
+ STD_EXCEPTION(0xe00, Trap_0e, UnknownException)
+ STD_EXCEPTION(0xf00, Trap_0f, UnknownException)
+
+ /* On the MPC8xx, this is a software emulation interrupt. It occurs
+ * for all unimplemented and illegal instructions.
+ */
+ STD_EXCEPTION(0x1000, SoftEmu, SoftEmuException)
+ STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException)
+ STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException)
+ STD_EXCEPTION(0x1300, InstructionTLBError, UnknownException)
+ STD_EXCEPTION(0x1400, DataTLBError, UnknownException)
+
+ STD_EXCEPTION(0x1500, Reserved5, UnknownException)
+ STD_EXCEPTION(0x1600, Reserved6, UnknownException)
+ STD_EXCEPTION(0x1700, Reserved7, UnknownException)
+ STD_EXCEPTION(0x1800, Reserved8, UnknownException)
+ STD_EXCEPTION(0x1900, Reserved9, UnknownException)
+ STD_EXCEPTION(0x1a00, ReservedA, UnknownException)
+ STD_EXCEPTION(0x1b00, ReservedB, UnknownException)
+
+ STD_EXCEPTION(0x1c00, DataBreakpoint, UnknownException)
+ STD_EXCEPTION(0x1d00, InstructionBreakpoint, DebugException)
+ STD_EXCEPTION(0x1e00, PeripheralBreakpoint, UnknownException)
+ STD_EXCEPTION(0x1f00, DevPortBreakpoint, UnknownException)
+
+
+ .globl _end_of_vectors
+_end_of_vectors:
+
+
+ . = 0x2000
+
+/*
+ * This code finishes saving the registers to the exception frame
+ * and jumps to the appropriate handler for the exception.
+ * Register r21 is pointer into trap frame, r1 has new stack pointer.
+ */
+ .globl transfer_to_handler
+transfer_to_handler:
+ stw r22,_NIP(r21)
+ lis r22,MSR_POW@h
+ andc r23,r23,r22
+ stw r23,_MSR(r21)
+ SAVE_GPR(7, r21)
+ SAVE_4GPRS(8, r21)
+ SAVE_8GPRS(12, r21)
+ SAVE_8GPRS(24, r21)
+ mflr r23
+ andi. r24,r23,0x3f00 /* get vector offset */
+ stw r24,TRAP(r21)
+ li r22,0
+ stw r22,RESULT(r21)
+ mtspr SPRG2,r22 /* r1 is now kernel sp */
+ lwz r24,0(r23) /* virtual address of handler */
+ lwz r23,4(r23) /* where to go when done */
+ mtspr SRR0,r24
+ mtspr SRR1,r20
+ mtlr r23
+ SYNC
+ rfi /* jump to handler, enable MMU */
+
+int_return:
+ mfmsr r28 /* Disable interrupts */
+ li r4,0
+ ori r4,r4,MSR_EE
+ andc r28,r28,r4
+ SYNC /* Some chip revs need this... */
+ mtmsr r28
+ SYNC
+ lwz r2,_CTR(r1)
+ lwz r0,_LINK(r1)
+ mtctr r2
+ mtlr r0
+ lwz r2,_XER(r1)
+ lwz r0,_CCR(r1)
+ mtspr XER,r2
+ mtcrf 0xFF,r0
+ REST_10GPRS(3, r1)
+ REST_10GPRS(13, r1)
+ REST_8GPRS(23, r1)
+ REST_GPR(31, r1)
+ lwz r2,_NIP(r1) /* Restore environment */
+ lwz r0,_MSR(r1)
+ mtspr SRR0,r2
+ mtspr SRR1,r0
+ lwz r0,GPR0(r1)
+ lwz r2,GPR2(r1)
+ lwz r1,GPR1(r1)
+ SYNC
+ rfi
+
+
+/*
+ * unsigned int get_immr (unsigned int mask)
+ *
+ * return (mask ? (IMMR & mask) : IMMR);
+ */
+ .globl get_immr
+get_immr:
+ mr r4,r3 /* save mask */
+ mfspr r3, IMMR /* IMMR */
+ cmpwi 0,r4,0 /* mask != 0 ? */
+ beq 4f
+ and r3,r3,r4 /* IMMR & mask */
+4:
+ blr
+
+ .globl get_pvr
+get_pvr:
+ mfspr r3, PVR
+ blr
+
+
+/*------------------------------------------------------------------------------*/
+
+/*
+ * void relocate_code (addr_sp, gd, addr_moni)
+ *
+ * This "function" does not return, instead it continues in RAM
+ * after relocating the monitor code.
+ *
+ * r3 = dest
+ * r4 = src
+ * r5 = length in bytes
+ * r6 = cachelinesize
+ */
+ .globl relocate_code
+relocate_code:
+ mr r1, r3 /* Set new stack pointer in SRAM */
+ mr r9, r4 /* Save copy of global data pointer in SRAM */
+ mr r10, r5 /* Save copy of monitor destination Address in SRAM */
+
+ mr r3, r5 /* Destination Address */
+ lis r4, CFG_MONITOR_BASE@h /* Source Address */
+ ori r4, r4, CFG_MONITOR_BASE@l
+ lis r5, CFG_MONITOR_LEN@h /* Length in Bytes */
+ ori r5, r5, CFG_MONITOR_LEN@l
+
+ /*
+ * Fix GOT pointer:
+ *
+ * New GOT-PTR = (old GOT-PTR - CFG_MONITOR_BASE) + Destination Address
+ *
+ * Offset:
+ */
+ sub r15, r10, r4
+
+ /* First our own GOT */
+ add r14, r14, r15
+ /* the the one used by the C code */
+ add r30, r30, r15
+
+ /*
+ * Now relocate code
+ */
+
+ cmplw cr1,r3,r4
+ addi r0,r5,3
+ srwi. r0,r0,2
+ beq cr1,4f /* In place copy is not necessary */
+ beq 4f /* Protect against 0 count */
+ mtctr r0
+ bge cr1,2f
+
+ la r8,-4(r4)
+ la r7,-4(r3)
+1: lwzu r0,4(r8)
+ stwu r0,4(r7)
+ bdnz 1b
+ b 4f
+
+2: slwi r0,r0,2
+ add r8,r4,r0
+ add r7,r3,r0
+3: lwzu r0,-4(r8)
+ stwu r0,-4(r7)
+ bdnz 3b
+
+4: sync
+ isync
+
+/*
+ * We are done. Do not return, instead branch to second part of board
+ * initialization, now running from RAM.
+ */
+
+ addi r0, r10, in_ram - _start + EXC_OFF_SYS_RESET
+ mtlr r0
+ blr
+
+in_ram:
+
+ /*
+ * Relocation Function, r14 point to got2+0x8000
+ *
+ * Adjust got2 pointers, no need to check for 0, this code
+ * already puts a few entries in the table.
+ */
+ li r0,__got2_entries@sectoff@l
+ la r3,GOT(_GOT2_TABLE_)
+ lwz r11,GOT(_GOT2_TABLE_)
+ mtctr r0
+ sub r11,r3,r11
+ addi r3,r3,-4
+1: lwzu r0,4(r3)
+ add r0,r0,r11
+ stw r0,0(r3)
+ bdnz 1b
+
+ /*
+ * Now adjust the fixups and the pointers to the fixups
+ * in case we need to move ourselves again.
+ */
+2: li r0,__fixup_entries@sectoff@l
+ lwz r3,GOT(_FIXUP_TABLE_)
+ cmpwi r0,0
+ mtctr r0
+ addi r3,r3,-4
+ beq 4f
+3: lwzu r4,4(r3)
+ lwzux r0,r4,r11
+ add r0,r0,r11
+ stw r10,0(r3)
+ stw r0,0(r4)
+ bdnz 3b
+4:
+clear_bss:
+ /*
+ * Now clear BSS segment
+ */
+ lwz r3,GOT(.bss)
+ lwz r4,GOT(_end)
+ cmplw 0, r3, r4
+ beq 6f
+
+ li r0, 0
+5:
+ stw r0, 0(r3)
+ addi r3, r3, 4
+ cmplw 0, r3, r4
+ bne 5b
+6:
+
+ mr r3, r9 /* Global Data pointer */
+ mr r4, r10 /* Destination Address */
+ bl board_init_r
+
+ /* Problems accessing "end" in C, so do it here */
+ .globl get_endaddr
+get_endaddr:
+ lwz r3,GOT(_end)
+ blr
+
+ /*
+ * Copy exception vector code to low memory
+ *
+ * r3: dest_addr
+ * r7: source address, r8: end address, r9: target address
+ */
+ .globl trap_init
+trap_init:
+ lwz r7, GOT(_start)
+ lwz r8, GOT(_end_of_vectors)
+
+ rlwinm r9, r7, 0, 22, 31 /* _start & 0x3FF */
+
+ cmplw 0, r7, r8
+ bgelr /* return if r7>=r8 - just in case */
+
+ mflr r4 /* save link register */
+1:
+ lwz r0, 0(r7)
+ stw r0, 0(r9)
+ addi r7, r7, 4
+ addi r9, r9, 4
+ cmplw 0, r7, r8
+ bne 1b
+
+ /*
+ * relocate `hdlr' and `int_return' entries
+ */
+ li r7, .L_MachineCheck - _start + EXC_OFF_SYS_RESET
+ li r8, Alignment - _start + EXC_OFF_SYS_RESET
+2:
+ bl trap_reloc
+ addi r7, r7, 0x100 /* next exception vector */
+ cmplw 0, r7, r8
+ blt 2b
+
+ li r7, .L_Alignment - _start + EXC_OFF_SYS_RESET
+ bl trap_reloc
+
+ li r7, .L_ProgramCheck - _start + EXC_OFF_SYS_RESET
+ bl trap_reloc
+
+ li r7, .L_FPUnavailable - _start + EXC_OFF_SYS_RESET
+ li r8, SystemCall - _start + EXC_OFF_SYS_RESET
+3:
+ bl trap_reloc
+ addi r7, r7, 0x100 /* next exception vector */
+ cmplw 0, r7, r8
+ blt 3b
+
+ li r7, .L_SingleStep - _start + EXC_OFF_SYS_RESET
+ li r8, _end_of_vectors - _start + EXC_OFF_SYS_RESET
+4:
+ bl trap_reloc
+ addi r7, r7, 0x100 /* next exception vector */
+ cmplw 0, r7, r8
+ blt 4b
+
+ mtlr r4 /* restore link register */
+ blr
+
+ /*
+ * Function: relocate entries for one exception vector
+ */
+trap_reloc:
+ lwz r0, 0(r7) /* hdlr ... */
+ add r0, r0, r3 /* ... += dest_addr */
+ stw r0, 0(r7)
+
+ lwz r0, 4(r7) /* int_return ... */
+ add r0, r0, r3 /* ... += dest_addr */
+ stw r0, 4(r7)
+
+ sync
+ isync
+
+ blr
diff --git a/cpu/mpc5xx/status_led.c b/cpu/mpc5xx/status_led.c
new file mode 100644
index 0000000..f15bbe8
--- /dev/null
+++ b/cpu/mpc5xx/status_led.c
@@ -0,0 +1,161 @@
+/*
+ * (C) Copyright 2000-2002 Wolfgang Denk, DENX Software Engineering, wd@denx.de
+ * (C) Copyright 2003 Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+ *
+ * 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
+ */
+
+/*
+ * File: status_led.c
+ *
+ * Discription: Blink a board led to show boot progress. Led's
+ * are connected via the MIOS module.
+ */
+
+#include <common.h>
+#include <mpc5xx.h>
+#include <status_led.h>
+
+#ifdef CONFIG_STATUS_LED
+
+typedef struct {
+ ulong mask;
+ int state;
+ int period;
+ int cnt;
+} led_dev_t;
+
+led_dev_t led_dev[] = {
+ { STATUS_LED_BIT,
+ STATUS_LED_STATE,
+ STATUS_LED_PERIOD,
+ 0,
+ },
+#if defined(STATUS_LED_BIT1)
+ { STATUS_LED_BIT1,
+ STATUS_LED_STATE1,
+ STATUS_LED_PERIOD1,
+ 0,
+ },
+#endif
+#if defined(STATUS_LED_BIT2)
+ { STATUS_LED_BIT2,
+ STATUS_LED_STATE2,
+ STATUS_LED_PERIOD2,
+ 0,
+ },
+#endif
+#if defined(STATUS_LED_BIT3)
+ { STATUS_LED_BIT3,
+ STATUS_LED_STATE3,
+ STATUS_LED_PERIOD3,
+ 0,
+ },
+#endif
+};
+
+#define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
+
+static int status_led_init_done = 0;
+
+static void status_led_init (void)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ int i;
+
+ for (i=0; i<MAX_LED_DEV; ++i) {
+ led_dev_t *ld = &led_dev[i];
+
+ immr->STATUS_LED_DIR = STATUS_LED_BIT;
+
+#if (STATUS_LED_ACTIVE == 0)
+ if (ld->state == STATUS_LED_ON)
+ immr->STATUS_LED_DAT &= ~(ld->mask);
+ else
+ immr->STATUS_LED_DAT |= ld->mask ;
+#else
+ if (ld->state == STATUS_LED_ON)
+ immr->STATUS_LED_DAT |= ld->mask ;
+ else
+ immr->STATUS_LED_DAT &= ~(ld->mask);
+#endif
+ }
+
+ status_led_init_done = 1;
+}
+
+void status_led_tick (ulong timestamp)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ int i;
+
+ if (!status_led_init_done)
+ status_led_init();
+
+ for (i=0; i<MAX_LED_DEV; ++i) {
+ led_dev_t *ld = &led_dev[i];
+
+ if (ld->state != STATUS_LED_BLINKING)
+ continue;
+
+ if (++(ld->cnt) >= ld->period) {
+ immr->STATUS_LED_DAT ^= ld->mask;
+ ld->cnt -= ld->period;
+ }
+ }
+}
+
+void status_led_set (int led, int state)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ led_dev_t *ld;
+
+ if (led < 0 || led >= MAX_LED_DEV)
+ return;
+
+ if (!status_led_init_done)
+ status_led_init();
+
+ ld = &led_dev[led];
+
+ switch (state) {
+ default:
+ return;
+ case STATUS_LED_BLINKING:
+ ld->cnt = 0; /* always start with full period */
+ /* fall through */ /* always start with LED _ON_ */
+ case STATUS_LED_ON:
+#if (STATUS_LED_ACTIVE == 0)
+ immr->STATUS_LED_DAT &= ~(ld->mask);
+#else
+ immr->STATUS_LED_DAT |= ld->mask ;
+#endif
+ break;
+ case STATUS_LED_OFF:
+#if (STATUS_LED_ACTIVE == 0)
+ immr->STATUS_LED_DAT |= ld->mask ;
+#else
+ immr->STATUS_LED_DAT &= ~(ld->mask);
+#endif
+ break;
+ }
+ ld->state = state;
+}
+
+#endif /* CONFIG_STATUS_LED */
diff --git a/cpu/mpc5xx/traps.c b/cpu/mpc5xx/traps.c
new file mode 100644
index 0000000..41939c1
--- /dev/null
+++ b/cpu/mpc5xx/traps.c
@@ -0,0 +1,231 @@
+/*
+ * 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
+
+#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
+extern void do_bedbug_breakpoint(struct pt_regs *);
+#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 0x0001000
+
+
+/*
+ * Print stack backtrace
+ */
+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");
+}
+
+/*
+ * Print current registers
+ */
+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");
+ }
+ }
+}
+
+
+/*
+ * General exception handler routine
+ */
+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);
+}
+
+/*
+ * Machine check exception handler routine
+ */
+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\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");
+}
+
+/*
+ * Alignment exception handler routine
+ */
+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");
+}
+
+/*
+ * Program check exception handler routine
+ */
+void ProgramCheckException(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("Program Check Exception");
+}
+
+/*
+ * Software emulation exception handler routine
+ */
+void SoftEmuException(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("Software Emulation Exception");
+}
+
+
+/*
+ * Unknown exception handler routine
+ */
+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);
+}
+
+/*
+ * Debug exception handler routine
+ */
+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
+}
generated by cgit v1.1 at 2024-11-26 22:16:38 +0000