carl9170 firmware: put _start into the .boot section

[carl9170fw.git] / carlfw / src / main.c

diff --git a/carlfw/src/main.c b/carlfw/src/main.c
index 0653ae44dde34bb8be28d9061b014a8c7d298c6c..574154bafd1faaba526feb007e3f3bbd3009d764 100644 (file)
--- a/carlfw/src/main.c
+++ b/carlfw/src/main.c
@@ -45,6 +45,19 @@ static void timer_init(const unsigned int timer, const unsigned int interval)
        orl(AR9170_TIMER_REG_INTERRUPT, BIT(timer));
 }
 
+void clock_set(enum cpu_clock_t _clock, bool on)
+{
+       /*
+        * Word of Warning!
+        * This setting does more than just mess with the CPU Clock.
+        * So watch out, if you need _stable_ timer interrupts.
+        */
+
+       fw.ticks_per_msec = GET_VAL(AR9170_PWR_PLL_ADDAC_DIV, get(AR9170_PWR_REG_PLL_ADDAC)) >> 1;
+
+       set(AR9170_PWR_REG_CLOCK_SEL, (uint32_t) ((on ? 0x70 : 0x600) | _clock));
+}
+
 static void init(void)
 {
        led_init();
@@ -163,7 +176,7 @@ static void __noreturn main_loop(void)
  * we put _start() there with the linker script carl9170.lds.
  */
 
-void start(void)
+void __section(boot) start(void)
 {
        clock_set(AHB_40MHZ_OSC, true);