86xx: Reset update
Update the 86xx reset sequence to try executing a board-specific reset
function. If the board-specific reset is not implemented or does not
succeed, then assert #HRESET_REQ. Using #HRESET_REQ is a more standard
reset procedure than the previous method and allows all board
peripherals to be reset if needed.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/cpu/mpc86xx/cpu.c b/cpu/mpc86xx/cpu.c
index dc53bee..b2a107d 100644
--- a/cpu/mpc86xx/cpu.c
+++ b/cpu/mpc86xx/cpu.c
@@ -32,6 +32,17 @@
#include <asm/fsl_law.h>
+/*
+ * Default board reset function
+ */
+static void
+__board_reset(void)
+{
+ /* Do nothing */
+}
+void board_reset(void) __attribute((weak, alias("__board_reset")));
+
+
int
checkcpu(void)
{
@@ -115,73 +126,20 @@
}
-static inline void
-soft_restart(unsigned long addr)
-{
-#if !defined(CONFIG_MPC8641HPCN) && !defined(CONFIG_MPC8610HPCD)
-
- /*
- * SRR0 has system reset vector, SRR1 has default MSR value
- * rfi restores MSR from SRR1 and sets the PC to the SRR0 value
- */
-
- __asm__ __volatile__ ("mtspr 26, %0" :: "r" (addr));
- __asm__ __volatile__ ("li 4, (1 << 6)" ::: "r4");
- __asm__ __volatile__ ("mtspr 27, 4");
- __asm__ __volatile__ ("rfi");
-
-#else /* CONFIG_MPC8641HPCN */
-
- out8(PIXIS_BASE + PIXIS_RST, 0);
-
-#endif /* !CONFIG_MPC8641HPCN */
-
- while (1) ; /* not reached */
-}
-
-
-/*
- * No generic way to do board reset. Simply call soft_reset.
- */
void
do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
-#if !defined(CONFIG_MPC8641HPCN) && !defined(CONFIG_MPC8610HPCD)
+ volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
+ volatile ccsr_gur_t *gur = &immap->im_gur;
-#ifdef CONFIG_SYS_RESET_ADDRESS
- ulong addr = CONFIG_SYS_RESET_ADDRESS;
-#else
- /*
- * note: when CONFIG_SYS_MONITOR_BASE points to a RAM address,
- * CONFIG_SYS_MONITOR_BASE - sizeof (ulong) is usually a valid
- * address. Better pick an address known to be invalid on your
- * system and assign it to CONFIG_SYS_RESET_ADDRESS.
- */
- ulong addr = CONFIG_SYS_MONITOR_BASE - sizeof(ulong);
-#endif
+ /* Attempt board-specific reset */
+ board_reset();
- /* flush and disable I/D cache */
- __asm__ __volatile__ ("mfspr 3, 1008" ::: "r3");
- __asm__ __volatile__ ("ori 5, 5, 0xcc00" ::: "r5");
- __asm__ __volatile__ ("ori 4, 3, 0xc00" ::: "r4");
- __asm__ __volatile__ ("andc 5, 3, 5" ::: "r5");
- __asm__ __volatile__ ("sync");
- __asm__ __volatile__ ("mtspr 1008, 4");
- __asm__ __volatile__ ("isync");
- __asm__ __volatile__ ("sync");
- __asm__ __volatile__ ("mtspr 1008, 5");
- __asm__ __volatile__ ("isync");
- __asm__ __volatile__ ("sync");
+ /* Next try asserting HRESET_REQ */
+ out_be32(&gur->rstcr, MPC86xx_RSTCR_HRST_REQ);
- soft_restart(addr);
-
-#else /* CONFIG_MPC8641HPCN */
-
- out8(PIXIS_BASE + PIXIS_RST, 0);
-
-#endif /* !CONFIG_MPC8641HPCN */
-
- while (1) ; /* not reached */
+ while (1)
+ ;
}