Changeset 590ce352 in mainline

Timestamp:

2012-03-07T21:07:55Z (12 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

13be128d

Parents:

b8e56d9b

Message:

breagleboard: Use amdm37x timer1 as system timer.

File:

• kernel/arch/arm32/src/mach/beagleboardxm/beagleboardxm.c (modified) (6 diffs)

kernel/arch/arm32/src/mach/beagleboardxm/beagleboardxm.c

@@ -37 +37 @@
 #include <genarch/drivers/amdm37x_irc/amdm37x_irc.h>
 #include <genarch/drivers/amdm37x_uart/amdm37x_uart.h>
+#include <genarch/drivers/amdm37x_gpt/amdm37x_gpt.h>
 #include <interrupt.h>
 #include <mm/km.h>
@@ -59 +60 @@
         amdm37x_irc_regs_t *irc_addr;
         amdm37x_uart_t uart;
+        amdm37x_gpt_t timer;
 } beagleboard;
 
 struct arm_machine_ops bbxm_machine_ops = {
-        bbxm_init,
-        bbxm_timer_irq_start,
-        bbxm_cpu_halt,
-        bbxm_get_memory_extents,
-        bbxm_irq_exception,
-        bbxm_frame_init,
-        bbxm_output_init,
-        bbxm_input_init,
-        bbxm_get_irq_count,
-        bbxm_get_platform_name
+        .machine_init = bbxm_init,
+        .machine_timer_irq_start = bbxm_timer_irq_start,
+        .machine_cpu_halt = bbxm_cpu_halt,
+        .machine_get_memory_extents = bbxm_get_memory_extents,
+        .machine_irq_exception = bbxm_irq_exception,
+        .machine_frame_init = bbxm_frame_init,
+        .machine_output_init = bbxm_output_init,
+        .machine_input_init = bbxm_input_init,
+        .machine_get_irq_count = bbxm_get_irq_count,
+        .machine_get_platform_name = bbxm_get_platform_name
 };
 
@@ -98 +100 @@
         amdm37x_irc_init(beagleboard.irc_addr);
 
-        //initialize timer here
+        // TODO: setup 32kHz clock source for timer1
+
+        /* Initialize timer, pick timer1, beacues it is in always power domain
+         * and has special capabilities for regular ticks */
+        amdm37x_gpt_timer_ticks_init(&beagleboard.timer,
+            AMDM37x_GPT1_BASE_ADDRESS, AMDM37x_GPT1_SIZE, 100);
 }
 
@@ -107 +114 @@
         irq_initialize(&timer_irq);
         timer_irq.devno = device_assign_devno();
-        timer_irq.inr = 0;//BB_TIMER_IRQ;
+        timer_irq.inr = AMDM37x_GPT1_IRQ;
         timer_irq.claim = bb_timer_irq_claim;
         timer_irq.handler = bb_timer_irq_handler;
         irq_register(&timer_irq);
-        // start timer here
+
+        /* Start timer here */
+        amdm37x_gpt_timer_ticks_start(&beagleboard.timer);
 }
 
 static void bbxm_cpu_halt(void)
 {
+        while (1);
 }
 
@@ -125 +135 @@
 static void bbxm_get_memory_extents(uintptr_t *start, size_t *size)
 {
-        // FIXME: This is just a guess...
         *start = BBXM_MEMORY_START;
         *size = BBXM_MEMORY_SIZE;
@@ -156 +165 @@
 #error "Frame buffer is not yet supported!"
 #endif
-
         /* UART3 is wired to external RS232 connector */
         const bool ok = amdm37x_uart_init(&beagleboard.uart,