diff options
Diffstat (limited to 'arch/blackfin/cpu/reset.c')
-rw-r--r-- | arch/blackfin/cpu/reset.c | 96 |
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 b6718d3bb5..0000000000 --- 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; -} |