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bsp/leon3: Fix SMP initialization

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Avoid usage of the same stack area by multiple secondary processors at
the same time.

Avoid magic delay loops.
This commit is contained in:
Sebastian Huber
2014-02-05 15:15:51 +01:00
parent 3ef2d175fa
commit 3d770018d9
3 changed files with 34 additions and 51 deletions
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7
c/src/lib/libbsp/sparc/leon3/include/leon.h
View File

@@ -310,6 +310,13 @@ void apbuart_outbyte_polled(
*/
int apbuart_inbyte_nonblocking(struct apbuart_regs *regs);
/**
* @brief Initializes a secondary processor.
*
* @param[in] cpu The processor executing this function.
*/
void leon3_secondary_cpu_initialize(uint32_t cpu);
#endif /* !ASM */
#ifdef __cplusplus

31
c/src/lib/libbsp/sparc/leon3/smp/smp_leon3.c
View File

@@ -13,8 +13,8 @@
* http://www.rtems.com/license/LICENSE.
*/
#include <rtems.h>
#include <bsp.h>
#include <leon.h>
#include <rtems/bspIo.h>
#include <rtems/bspsmp.h>
#include <stdlib.h>
@@ -40,10 +40,8 @@ static rtems_isr bsp_ap_ipi_isr(
rtems_smp_process_interrupt();
}
static void leon3_secondary_cpu_initialize(void)
void leon3_secondary_cpu_initialize(uint32_t cpu)
{
uint32_t cpu = rtems_smp_get_current_processor();
sparc_leon3_set_cctrl( 0x80000F );
LEON_Unmask_interrupt(LEON3_MP_IRQ);
LEON3_IrqCtrl_Regs->mask[cpu] |= 1 << LEON3_MP_IRQ;
@@ -51,13 +49,6 @@ static void leon3_secondary_cpu_initialize(void)
rtems_smp_secondary_cpu_initialize();
}
/*
* Used to pass information to start.S when bringing secondary CPUs
* out of reset.
*/
void *bsp_ap_stack;
void *bsp_ap_entry;
static void bsp_smp_delay( int );
uint32_t bsp_smp_initialize( uint32_t configured_cpu_count )
@@ -87,28 +78,14 @@ uint32_t bsp_smp_initialize( uint32_t configured_cpu_count )
set_vector(bsp_ap_ipi_isr, LEON_TRAP_TYPE(LEON3_MP_IRQ), 1);
}
for ( cpu=1 ; cpu < found_cpus ; cpu++ ) {
const Per_CPU_Control *per_cpu = _Per_CPU_Get_by_index( cpu );
for ( cpu = 1 ; cpu < found_cpus ; ++cpu ) {
#if defined(RTEMS_DEBUG)
printk( "Waking CPU %d\n", cpu );
#endif
bsp_ap_stack = per_cpu->interrupt_stack_high -
CPU_MINIMUM_STACK_FRAME_SIZE;
bsp_ap_entry = leon3_secondary_cpu_initialize;
LEON3_IrqCtrl_Regs->mpstat = 1 << cpu;
bsp_smp_delay( 1000000 );
#if defined(RTEMS_DEBUG)
printk(
"CPU %d is %s\n",
cpu,
per_cpu->state == PER_CPU_STATE_READY_TO_BEGIN_MULTITASKING ?
"online" : "offline"
);
#endif
}
return found_cpus;
}