summaryrefslogtreecommitdiff
path: root/arch/blackfin/cpu/reset.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/blackfin/cpu/reset.c')
-rw-r--r--arch/blackfin/cpu/reset.c96
1 files changed, 0 insertions, 96 deletions
diff --git a/arch/blackfin/cpu/reset.c b/arch/blackfin/cpu/reset.c
deleted file mode 100644
index b6718d3..0000000
--- a/arch/blackfin/cpu/reset.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * reset.c - logic for resetting the cpu
- *
- * Copyright (c) 2005-2008 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <common.h>
-#include <command.h>
-#include <asm/blackfin.h>
-#include <asm/mach-common/bits/bootrom.h>
-#include "cpu.h"
-
-/* A system soft reset makes external memory unusable so force
- * this function into L1. We use the compiler ssync here rather
- * than SSYNC() because it's safe (no interrupts and such) and
- * we save some L1. We do not need to force sanity in the SYSCR
- * register as the BMODE selection bit is cleared by the soft
- * reset while the Core B bit (on dual core parts) is cleared by
- * the core reset.
- */
-__attribute__ ((__l1_text__, __noreturn__))
-static void bfin_reset(void)
-{
-#ifdef SWRST
- /* Wait for completion of "system" events such as cache line
- * line fills so that we avoid infinite stalls later on as
- * much as possible. This code is in L1, so it won't trigger
- * any such event after this point in time.
- */
- __builtin_bfin_ssync();
-
- /* Initiate System software reset. */
- bfin_write_SWRST(0x7);
-
- /* Due to the way reset is handled in the hardware, we need
- * to delay for 10 SCLKS. The only reliable way to do this is
- * to calculate the CCLK/SCLK ratio and multiply 10. For now,
- * we'll assume worse case which is a 1:15 ratio.
- */
- asm(
- "LSETUP (1f, 1f) LC0 = %0\n"
- "1: nop;"
- :
- : "a" (15 * 10)
- : "LC0", "LB0", "LT0"
- );
-
- /* Clear System software reset */
- bfin_write_SWRST(0);
-
- /* The BF526 ROM will crash during reset */
-#if defined(__ADSPBF522__) || defined(__ADSPBF524__) || defined(__ADSPBF526__)
- /* Seems to be fixed with newer parts though ... */
- if (__SILICON_REVISION__ < 1 && bfin_revid() < 1)
- bfin_read_SWRST();
-#endif
-
- /* Wait for the SWRST write to complete. Cannot rely on SSYNC
- * though as the System state is all reset now.
- */
- asm(
- "LSETUP (1f, 1f) LC1 = %0\n"
- "1: nop;"
- :
- : "a" (15 * 1)
- : "LC1", "LB1", "LT1"
- );
-#endif
-
- while (1)
-#if defined(__ADSPBF60x__)
- bfin_write_RCU0_CTL(0x1);
-#else
- /* Issue core reset */
- asm("raise 1");
-#endif
-}
-
-/* We need to trampoline ourselves up into L1 since our linker
- * does not have relaxtion support and will only generate a
- * PC relative call with a 25 bit immediate. This is not enough
- * to get us from the top of SDRAM into L1.
- */
-int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
-{
- if (board_reset)
- board_reset();
- if (ANOMALY_05000353 || ANOMALY_05000386)
- while (1)
- asm("jump (%0);" : : "a" (bfin_reset));
- else
- bfrom_SoftReset((void *)(L1_SRAM_SCRATCH_END - 20));
- return 0;
-}