ppc-hw.c File Reference

#include <os_config.h>
#include <config/config_param.h>
#include <config/config_cparam.h>
#include <sys/ktypes.h>
#include <xparameters.h>
#include <sys/process.h>
#include <xil_exception.h>
#include <xtime_l.h>
#include <xpseudo_asm.h>
#include <sys/syscall.h>
#include <sys/decls.h>
#include <xreg405.h>
#include <stdio.h>

Functions
void	hw_init (void)
void	pit_initialize (unsigned int interval)
void	pit_reset (void)
void	timer_int_handler (int)
void	xmk_enter_kernel (void)
void	xmk_leave_kernel (void)
Variables
char	timer_need_refresh
	Ticks since kernel startup.
unsigned char	sched_partial_tick
	Do we need a reset?

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Detailed Description

PPC Hardware initialization

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Function Documentation

void hw_init (  void   )

Microblaze hardware specific initialization If an interrupt controller is present register interrupt controller handler as the main interrupt handler. Register timer with interrupt controller handler Else, Register timer interrupt handler as the main interrupt handler Configure PIT is timer is PIT. Parameters: none  Returns: nothing Note: none

void pit_initialize (  unsigned int  interval  )

Initialize the PIT timer in the system Parameters: interval  is the interval to interrupt the system at. Returns: nothing Note: none

void pit_reset (  void   )

Enable and start PIT timer with configured PIT interval loaded to the PIT counter Parameters: none  Returns: nothing Note: none

void timer_int_handler (  int  irq_num  )

System timer interrupt handler Do a rescheduling operation If a context switch occurs within this routine, When returning out of process_scheduler, process executing will return in the appropriate context when it was switched out on a previous flow through this execution path. Reset PIT interval to start a full time slice (if PIT in the system) (if INTC not present) Parameters: none  Returns: nothing Note: May NOT return from this routine if a NEW process context is scheduled in the scheduler A context switch does not occur within this routine if an INTC is present. The switch occurs at the end of the INTC ISR.

void xmk_enter_kernel (  void   )  [inline]

Lock kernel by turning off ALL system interrupts Returns: Nothing Note: Locks kernel against ALL interrupts. Does not lock against critical interrupts.

void xmk_leave_kernel (  void   )  [inline]

Unlock kernel by turning on system timer interrupts Returns: Nothing Note: Unlocks kernel with respect to ALL interrupts except critical interrupts

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