forked from Imagelibrary/rtems
54d87f2e52
Remove parameters from ppc_exc_initialize() since all BSPs passed the same values. Update #3459.
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
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* This set of routines starts the application. It includes application,
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* board, and monitor specific initialization and configuration.
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* The generic CPU dependent initialization has been performed
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* before any of these are invoked.
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*
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* COPYRIGHT (c) 1989-2008.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <string.h>
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#include <fcntl.h>
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#include <rtems/counter.h>
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#include <libcpu/bat.h>
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#include <libcpu/spr.h>
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#include <libcpu/powerpc-utility.h>
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#include <bsp.h>
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#include <bsp/irq.h>
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#include <bsp/vectors.h>
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#include <bsp/bootcard.h>
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#include <bsp/irq-generic.h>
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/*
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* CPU Bus Frequency
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*/
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unsigned int BSP_bus_frequency;
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/* Configuration parameter for clock driver */
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uint32_t bsp_time_base_frequency;
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/* Legacy */
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uint32_t bsp_clicks_per_usec;
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/*
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* Memory on this board.
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*/
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extern char RamSize[];
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uint32_t BSP_mem_size = (uint32_t)RamSize;
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/* Default decrementer exception handler */
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static int default_decrementer_exception_handler( BSP_Exception_frame *frame, unsigned number)
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{
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ppc_set_decrementer_register(UINT32_MAX);
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return 0;
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}
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uint32_t _CPU_Counter_frequency(void)
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{
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return bsp_time_base_frequency;
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}
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/*
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* bsp_start
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*
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* This routine does the bulk of the system initialization.
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*/
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void bsp_start( void )
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{
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rtems_status_code sc = RTEMS_SUCCESSFUL;
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/*
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* Note we can not get CPU identification dynamically, so
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* force current_ppc_cpu.
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*/
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current_ppc_cpu = PPC_PSIM;
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/*
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* initialize the device driver parameters
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* assume we are running with 20MHz bus
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* this should speed up some tests :-)
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*/
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BSP_bus_frequency = 20;
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bsp_time_base_frequency = 20000000;
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bsp_clicks_per_usec = BSP_bus_frequency;
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BSP_mem_size = (uint32_t )RamSize;
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ppc_exc_initialize();
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/* Install default handler for the decrementer exception */
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sc = ppc_exc_set_handler( ASM_DEC_VECTOR, default_decrementer_exception_handler);
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if (sc != RTEMS_SUCCESSFUL) {
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rtems_panic("cannot install decrementer exception handler");
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}
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/* Initalize interrupt support */
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bsp_interrupt_initialize();
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#if 0
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/*
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* Setup BATs and enable MMU
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*/
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/* Memory */
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setdbat(0, 0x0<<24, 0x0<<24, 2<<24, _PAGE_RW);
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setibat(0, 0x0<<24, 0x0<<24, 2<<24, 0);
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/* PCI */
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setdbat(1, 0x8<<24, 0x8<<24, 1<<24, IO_PAGE);
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setdbat(2, 0xc<<24, 0xc<<24, 1<<24, IO_PAGE);
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_write_MSR(_read_MSR() | MSR_DR | MSR_IR);
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__asm__ volatile("sync; isync");
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#endif
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}
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