mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-17 00:33:06 +00:00
7a4fb11b85
Remove the board.c and time.c files and all associated non-generic board initialization code. Signed-off-by: Francois Retief <fgretief@spaceteq.co.za>
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/* Initializes CPU and basic hardware such as memory
|
|
* controllers, IRQ controller and system timer 0.
|
|
*
|
|
* (C) Copyright 2007, 2015
|
|
* Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/asi.h>
|
|
#include <asm/leon.h>
|
|
#include <asm/io.h>
|
|
|
|
#include <config.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/*
|
|
* 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 available
|
|
* - no global variables available for writing
|
|
* - constants available
|
|
*/
|
|
|
|
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
|
|
|
|
/* disable timers */
|
|
leon2->Timer_Control_1 = leon2->Timer_Control_2 = 0;
|
|
}
|
|
|
|
int arch_cpu_init(void)
|
|
{
|
|
gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
|
|
gd->bus_clk = CONFIG_SYS_CLK_FREQ;
|
|
gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* initialize higher level parts of CPU
|
|
*/
|
|
int cpu_init_r(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* initiate and setup timer0 to configured HZ. Base clock is 1MHz.
|
|
*/
|
|
int timer_init(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;
|
|
|
|
/* SYS_HZ ticks per second */
|
|
leon2->Timer_Counter_1 = 0;
|
|
leon2->Timer_Reload_1 = (CONFIG_SYS_TIMER_RATE / CONFIG_SYS_HZ) - 1;
|
|
leon2->Timer_Control_1 = LEON2_TIMER_CTRL_EN | LEON2_TIMER_CTRL_RS |
|
|
LEON2_TIMER_CTRL_LD;
|
|
|
|
CONFIG_SYS_TIMER_COUNTER = (void *)&leon2->Timer_Counter_1;
|
|
return 0;
|
|
}
|