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-rw-r--r--cpu/leon2/cpu_init.c142
1 files changed, 0 insertions, 142 deletions
diff --git a/cpu/leon2/cpu_init.c b/cpu/leon2/cpu_init.c
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--- a/cpu/leon2/cpu_init.c
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-/* Initializes CPU and basic hardware such as memory
- * controllers, IRQ controller and system timer 0.
- *
- * (C) Copyright 2007
- * Daniel Hellstrom, Gaisler Research, daniel@gaisler.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 <asm/asi.h>
-#include <asm/leon.h>
-
-#include <config.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-/* reset CPU (jump to 0, without reset) */
-void start(void);
-
-struct {
- gd_t gd_area;
- bd_t bd;
-} global_data;
-
-/*
- * Breath some life into the CPU...
- *
- * Set up the memory map,
- * initialize a bunch of registers.
- *
- * Run from FLASH/PROM:
- * - until memory controller is set up, only registers avaiable
- * - no global variables available for writing
- * - constants avaiable
- */
-
-void cpu_init_f(void)
-{
- LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
-
- /* initialize the IRQMP */
- leon2->Interrupt_Force = 0;
- leon2->Interrupt_Pending = 0;
- leon2->Interrupt_Clear = 0xfffe; /* clear all old pending interrupts */
- leon2->Interrupt_Mask = 0xfffe0000; /* mask all IRQs */
-
- /* cache */
-
- /* I/O port setup */
-#ifdef LEON2_IO_PORT_DIR
- leon2->PIO_Direction = LEON2_IO_PORT_DIR;
-#endif
-#ifdef LEON2_IO_PORT_DATA
- leon2->PIO_Data = LEON2_IO_PORT_DATA;
-#endif
-#ifdef LEON2_IO_PORT_INT
- leon2->PIO_Interrupt = LEON2_IO_PORT_INT;
-#else
- leon2->PIO_Interrupt = 0;
-#endif
-}
-
-void cpu_init_f2(void)
-{
-
-}
-
-/*
- * initialize higher level parts of CPU like time base and timers
- */
-int cpu_init_r(void)
-{
- LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
-
- /* initialize prescaler common to all timers to 1MHz */
- leon2->Scaler_Counter = leon2->Scaler_Reload =
- (((CONFIG_SYS_CLK_FREQ / 1000) + 500) / 1000) - 1;
-
- return (0);
-}
-
-/* Uses Timer 0 to get accurate
- * pauses. Max 2 raised to 32 ticks
- *
- */
-void cpu_wait_ticks(unsigned long ticks)
-{
- unsigned long start = get_timer(0);
- while (get_timer(start) < ticks) ;
-}
-
-/* initiate and setup timer0 interrupt to 1MHz
- * Return irq number for timer int or a negative number for
- * dealing with self
- */
-int timer_interrupt_init_cpu(void)
-{
- LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
-
- /* 1ms ticks */
- leon2->Timer_Counter_1 = 0;
- leon2->Timer_Reload_1 = 999; /* (((1000000 / 100) - 1)) */
- leon2->Timer_Control_1 =
- (LEON2_TIMER_CTRL_EN | LEON2_TIMER_CTRL_RS | LEON2_TIMER_CTRL_LD);
-
- return LEON2_TIMER1_IRQNO;
-}
-
-/*
- * This function is intended for SHORT delays only.
- */
-unsigned long cpu_usec2ticks(unsigned long usec)
-{
- /* timer set to 1kHz ==> 1 clk tick = 1 msec */
- if (usec < 1000)
- return 1;
- return (usec / 1000);
-}
-
-unsigned long cpu_ticks2usec(unsigned long ticks)
-{
- /* 1tick = 1usec */
- return ticks * 1000;
-}