* Patch by Rick Bronson, 16 Mar 2003:

  Add support for Atmel AT91RM9200DK w/NAND

* Patches by Robert Schwebel, 19 Mar 2003:
  - use arm-linux-gcc as default compiler for ARM
  - fix i2c fixup code
  - fix missing baudrate setting
  - added $loadaddr / CFG_LOAD_ADDR support to loadb
  - moved "ignoring trailing characters" _before_ u-boot wants to
    print out diagnostics messages; removes bogus characters at the
    end of transmission

* Patch by John Zhan, 18 Mar 2003:
  Add support for SinoVee Microsystems SC8xx boards

* Patch by Rolf Offermanns, 21 Mar 2003:
  ported the dnp1110 related changes from the current armboot cvs to
  current u-boot cvs. smc91111 does not work. problem marked in
  smc91111.c, grep for "FIXME".

* Patch by Brian Auld, 25 Mar 2003:
  Add support for STM flash chips on ebony board

 * Add PCI support for MPC8250 Boards (PM825 module)

 * Patch by Stefan Roese, 25 Mar 2003:

1 files changed, 177 insertions, 0 deletions

diff --git a/cpu/at91rm9200/cpu.c b/cpu/at91rm9200/cpu.c
new file mode 100644
index 0000000..f41210b
--- /dev/null
+++ b/cpu/at91rm9200/cpu.c
@@ -0,0 +1,177 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.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
+ */
+
+#include <common.h>
+#include <command.h>
+#include <AT91RM9200.h>
+
+/* read co-processor 15, register #1 (control register) */
+static unsigned long read_p15_c1(void)
+{
+    unsigned long value;
+
+    __asm__ __volatile__(
+	"mrc     p15, 0, %0, c1, c0, 0   @ read control reg\n"
+	: "=r" (value)
+	:
+	: "memory");
+    /*printf("p15/c1 is = %08lx\n", value); */
+    return value;
+}
+
+/* write to co-processor 15, register #1 (control register) */
+static void write_p15_c1(unsigned long value)
+{
+    /*printf("write %08lx to p15/c1\n", value); */
+    __asm__ __volatile__(
+        "mcr     p15, 0, %0, c1, c0, 0   @ write it back\n"
+	: "=r" (value)
+	:
+	: "memory");
+
+    read_p15_c1();
+}
+
+static void cp_delay(void)
+{
+    volatile int i;
+
+    /* copro seems to need some delay between reading and writing */
+    for (i=0; i<100; i++);
+}
+/* See also ARM Ref. Man. */
+#define C1_MMU		(1<<0)	/* mmu off/on */
+#define C1_ALIGN	(1<<1)	/* alignment faults off/on */
+#define C1_IDC		(1<<2)	/* icache and/or dcache off/on */
+#define C1_WRITE_BUFFER	(1<<3)	/* write buffer off/on */
+#define C1_BIG_ENDIAN	(1<<7)	/* big endian off/on */
+#define C1_SYS_PROT	(1<<8)	/* system protection */
+#define C1_ROM_PROT	(1<<9)	/* ROM protection */
+#define C1_HIGH_VECTORS	(1<<13)	/* location of vectors: low/high addresses */
+
+int cpu_init(void)
+{
+    /*
+     * setup up stack if necessary
+     */
+#ifdef CONFIG_USE_IRQ
+    IRQ_STACK_START = _armboot_end +
+      			CONFIG_STACKSIZE + CONFIG_STACKSIZE_IRQ - 4;
+    FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ;
+    _armboot_real_end = FIQ_STACK_START + 4;
+#else
+    _armboot_real_end = _armboot_end + CONFIG_STACKSIZE;
+#endif
+    return 0;
+}
+
+int cleanup_before_linux(void)
+{
+    /*
+     * this function is called just before we call linux
+     * it prepares the processor for linux
+     *
+     * we turn off caches etc ...
+     * and we set the CPU-speed to 73 MHz - see start.S for details
+     */
+
+    disable_interrupts();
+    return 0;
+}
+
+int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+
+#ifdef CFG_SOFT_RESET
+    extern void reset_cpu(ulong addr);
+
+    disable_interrupts();
+    reset_cpu(0);
+#else
+   AT91PS_USART us = AT91C_BASE_US1;
+   AT91PS_PIO pio = AT91C_BASE_PIOA;
+
+   /*shutdown the console to avoid strange chars during reset */
+   us->US_CR = (AT91C_US_RSTRX | AT91C_US_RSTTX);
+
+   /* Clear PA19 to trigger the hard reset */
+   pio->PIO_CODR = 0x00080000;
+   pio->PIO_OER  = 0x00080000;
+   pio->PIO_PER  = 0x00080000;
+   /* Never reached */
+#endif
+   return 0;
+}
+
+void icache_enable(void)
+{
+    ulong reg;
+    reg = read_p15_c1();
+    cp_delay();
+    write_p15_c1(reg | C1_IDC);
+}
+
+void icache_disable(void)
+{
+    ulong reg;
+    reg = read_p15_c1();
+    cp_delay();
+    write_p15_c1(reg & ~C1_IDC);
+}
+
+int icache_status(void)
+{
+    return (read_p15_c1() & C1_IDC) != 0;
+    return 0;
+}
+
+void dcache_enable(void)
+{
+    ulong reg;
+    reg = read_p15_c1();
+    cp_delay();
+    write_p15_c1(reg | C1_IDC);
+}
+
+void dcache_disable(void)
+{
+    ulong reg;
+    reg = read_p15_c1();
+    cp_delay();
+    write_p15_c1(reg & ~C1_IDC);
+}
+
+int dcache_status(void)
+{
+    return (read_p15_c1() & C1_IDC) != 0;
+    return 0;
+}