1 files changed, 208 insertions, 0 deletions

diff --git a/arch/v850/kernel/anna.c b/arch/v850/kernel/anna.c
new file mode 100644
index 000000000000..6aaeab5e8a40
--- /dev/null
+++ b/arch/v850/kernel/anna.c
@@ -0,0 +1,208 @@
+/*
+ * arch/v850/kernel/anna.c -- Anna V850E2 evaluation chip/board
+ *
+ *  Copyright (C) 2002,03  NEC Electronics Corporation
+ *  Copyright (C) 2002,03  Miles Bader <miles@gnu.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file COPYING in the main directory of this
+ * archive for more details.
+ *
+ * Written by Miles Bader <miles@gnu.org>
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/major.h>
+#include <linux/irq.h>
+
+#include <asm/machdep.h>
+#include <asm/atomic.h>
+#include <asm/page.h>
+#include <asm/v850e_timer_d.h>
+#include <asm/v850e_uart.h>
+
+#include "mach.h"
+
+
+/* SRAM and SDRAM are vaguely contiguous (with a big hole in between; see
+   mach_reserve_bootmem for details); use both as one big area.  */
+#define RAM_START       SRAM_ADDR
+#define RAM_END         (SDRAM_ADDR + SDRAM_SIZE)
+
+/* The bits of this port are connected to an 8-LED bar-graph.  */
+#define LEDS_PORT       0
+
+
+static void anna_led_tick (void);
+
+
+void __init mach_early_init (void)
+{
+        ANNA_ILBEN    = 0;
+
+        V850E2_CSC(0) = 0x402F;
+        V850E2_CSC(1) = 0x4000;
+        V850E2_BPC    = 0;
+        V850E2_BSC    = 0xAAAA;
+        V850E2_BEC    = 0;
+
+#if 0
+        V850E2_BHC    = 0xFFFF; /* icache all memory, dcache all */
+#else
+        V850E2_BHC    = 0;      /* cache no memory */
+#endif
+        V850E2_BCT(0) = 0xB088;
+        V850E2_BCT(1) = 0x0008;
+        V850E2_DWC(0) = 0x0027;
+        V850E2_DWC(1) = 0;
+        V850E2_BCC    = 0x0006;
+        V850E2_ASC    = 0;
+        V850E2_LBS    = 0x0089;
+        V850E2_SCR(3) = 0x21A9;
+        V850E2_RFS(3) = 0x8121;
+
+        v850e_intc_disable_irqs ();
+}
+
+void __init mach_setup (char **cmdline)
+{
+        ANNA_PORT_PM (LEDS_PORT) = 0;   /* Make all LED pins output pins.  */
+        mach_tick = anna_led_tick;
+}
+
+void __init mach_get_physical_ram (unsigned long *ram_start,
+                                   unsigned long *ram_len)
+{
+        *ram_start = RAM_START;
+        *ram_len = RAM_END - RAM_START;
+}
+
+void __init mach_reserve_bootmem ()
+{
+        /* The space between SRAM and SDRAM is filled with duplicate
+           images of SRAM.  Prevent the kernel from using them.  */
+        reserve_bootmem (SRAM_ADDR + SRAM_SIZE,
+                         SDRAM_ADDR - (SRAM_ADDR + SRAM_SIZE));
+}
+
+void mach_gettimeofday (struct timespec *tv)
+{
+        tv->tv_sec = 0;
+        tv->tv_nsec = 0;
+}
+
+void __init mach_sched_init (struct irqaction *timer_action)
+{
+        /* Start hardware timer.  */
+        v850e_timer_d_configure (0, HZ);
+        /* Install timer interrupt handler.  */
+        setup_irq (IRQ_INTCMD(0), timer_action);
+}
+
+static struct v850e_intc_irq_init irq_inits[] = {
+        { "IRQ", 0,             NUM_MACH_IRQS,  1, 7 },
+        { "PIN", IRQ_INTP(0),   IRQ_INTP_NUM,   1, 4 },
+        { "CCC", IRQ_INTCCC(0), IRQ_INTCCC_NUM, 1, 5 },
+        { "CMD", IRQ_INTCMD(0), IRQ_INTCMD_NUM, 1, 5 },
+        { "DMA", IRQ_INTDMA(0), IRQ_INTDMA_NUM, 1, 2 },
+        { "DMXER", IRQ_INTDMXER,1,              1, 2 },
+        { "SRE", IRQ_INTSRE(0), IRQ_INTSRE_NUM, 3, 3 },
+        { "SR",  IRQ_INTSR(0),  IRQ_INTSR_NUM,  3, 4 },
+        { "ST",  IRQ_INTST(0),  IRQ_INTST_NUM,  3, 5 },
+        { 0 }
+};
+#define NUM_IRQ_INITS ((sizeof irq_inits / sizeof irq_inits[0]) - 1)
+
+static struct hw_interrupt_type hw_itypes[NUM_IRQ_INITS];
+
+void __init mach_init_irqs (void)
+{
+        v850e_intc_init_irq_types (irq_inits, hw_itypes);
+}
+
+void machine_restart (char *__unused)
+{
+#ifdef CONFIG_RESET_GUARD
+        disable_reset_guard ();
+#endif
+        asm ("jmp r0"); /* Jump to the reset vector.  */
+}
+
+EXPORT_SYMBOL(machine_restart);
+
+void machine_halt (void)
+{
+#ifdef CONFIG_RESET_GUARD
+        disable_reset_guard ();
+#endif
+        local_irq_disable ();   /* Ignore all interrupts.  */
+        ANNA_PORT_IO(LEDS_PORT) = 0xAA; /* Note that we halted.  */
+        for (;;)
+                asm ("halt; nop; nop; nop; nop; nop");
+}
+
+EXPORT_SYMBOL(machine_halt);
+
+void machine_power_off (void)
+{
+        machine_halt ();
+}
+
+EXPORT_SYMBOL(machine_power_off);
+
+/* Called before configuring an on-chip UART.  */
+void anna_uart_pre_configure (unsigned chan, unsigned cflags, unsigned baud)
+{
+        /* The Anna connects some general-purpose I/O pins on the CPU to
+           the RTS/CTS lines of UART 1's serial connection.  I/O pins P07
+           and P37 are RTS and CTS respectively.  */
+        if (chan == 1) {
+                ANNA_PORT_PM(0) &= ~0x80; /* P07 in output mode */
+                ANNA_PORT_PM(3) |=  0x80; /* P37 in input mode */
+        }
+}
+
+/* Minimum and maximum bounds for the moving upper LED boundary in the
+   clock tick display.  We can't use the last bit because it's used for
+   UART0's CTS output.  */
+#define MIN_MAX_POS 0
+#define MAX_MAX_POS 6
+
+/* There are MAX_MAX_POS^2 - MIN_MAX_POS^2 cycles in the animation, so if
+   we pick 6 and 0 as above, we get 49 cycles, which is when divided into
+   the standard 100 value for HZ, gives us an almost 1s total time.  */
+#define TICKS_PER_FRAME \
+        (HZ / (MAX_MAX_POS * MAX_MAX_POS - MIN_MAX_POS * MIN_MAX_POS))
+
+static void anna_led_tick ()
+{
+        static unsigned counter = 0;
+        
+        if (++counter == TICKS_PER_FRAME) {
+                static int pos = 0, max_pos = MAX_MAX_POS, dir = 1;
+
+                if (dir > 0 && pos == max_pos) {
+                        dir = -1;
+                        if (max_pos == MIN_MAX_POS)
+                                max_pos = MAX_MAX_POS;
+                        else
+                                max_pos--;
+                } else {
+                        if (dir < 0 && pos == 0)
+                                dir = 1;
+
+                        if (pos + dir <= max_pos) {
+                                /* Each bit of port 0 has a LED. */
+                                clear_bit (pos, &ANNA_PORT_IO(LEDS_PORT));
+                                pos += dir;
+                                set_bit (pos, &ANNA_PORT_IO(LEDS_PORT));
+                        }
+                }
+
+                counter = 0;
+        }
+}