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Diffstat (limited to 'cpu/leon2/cpu_init.c')
-rw-r--r-- | cpu/leon2/cpu_init.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/cpu/leon2/cpu_init.c b/cpu/leon2/cpu_init.c deleted file mode 100644 index a24f778..0000000 --- a/cpu/leon2/cpu_init.c +++ /dev/null @@ -1,142 +0,0 @@ -/* 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; -} |