From 685cdf86ea841caf01da70167b61f7b0b9db4435 Mon Sep 17 00:00:00 2001 From: Matthias Welwarsky Date: Thu, 6 Apr 2017 09:49:37 +0200 Subject: [PATCH] aarch64: speed up first examination Don't use atomic dap operations when not necessary. Also remove loop trying to set core power request, didn't find a platform where it actually worked and it's slowing examination down. Change-Id: I44e5c2f289f951b8f4579f08a841172404a52053 Signed-off-by: Matthias Welwarsky Reviewed-on: http://openocd.zylin.com/4143 Tested-by: jenkins Reviewed-by: Matthias Welwarsky --- src/target/aarch64.c | 60 +++++++++++++++----------------------------- 1 file changed, 20 insertions(+), 40 deletions(-) diff --git a/src/target/aarch64.c b/src/target/aarch64.c index f1ce9145..784274a0 100644 --- a/src/target/aarch64.c +++ b/src/target/aarch64.c @@ -180,7 +180,7 @@ static int aarch64_init_debug_access(struct target *target) int retval; uint32_t dummy; - LOG_DEBUG(" "); + LOG_DEBUG("%s", target_name(target)); retval = mem_ap_write_atomic_u32(armv8->debug_ap, armv8->debug_base + CPUV8_DBG_OSLAR, 0); @@ -2173,7 +2173,7 @@ static int aarch64_examine_first(struct target *target) int retval = ERROR_OK; uint64_t debug, ttypr; uint32_t cpuid; - uint32_t tmp0, tmp1; + uint32_t tmp0, tmp1, tmp2, tmp3; debug = ttypr = cpuid = 0; retval = dap_dp_init(swjdp); @@ -2213,32 +2213,6 @@ static int aarch64_examine_first(struct target *target) } else armv8->debug_base = target->dbgbase; - uint32_t prsr; - int64_t then = timeval_ms(); - do { - retval = mem_ap_read_atomic_u32(armv8->debug_ap, - armv8->debug_base + CPUV8_DBG_PRSR, &prsr); - if (retval == ERROR_OK) { - retval = mem_ap_write_atomic_u32(armv8->debug_ap, - armv8->debug_base + CPUV8_DBG_PRCR, PRCR_COREPURQ|PRCR_CORENPDRQ); - if (retval != ERROR_OK) { - LOG_DEBUG("write to PRCR failed"); - break; - } - } - - if (timeval_ms() > then + 1000) { - retval = ERROR_TARGET_TIMEOUT; - break; - } - - } while ((prsr & PRSR_PU) == 0); - - if (retval != ERROR_OK) { - LOG_ERROR("target %s: failed to set power state of the core.", target_name(target)); - return retval; - } - retval = mem_ap_write_atomic_u32(armv8->debug_ap, armv8->debug_base + CPUV8_DBG_OSLAR, 0); if (retval != ERROR_OK) { @@ -2246,34 +2220,40 @@ static int aarch64_examine_first(struct target *target) return retval; } - retval = mem_ap_read_atomic_u32(armv8->debug_ap, + retval = mem_ap_read_u32(armv8->debug_ap, armv8->debug_base + CPUV8_DBG_MAINID0, &cpuid); if (retval != ERROR_OK) { LOG_DEBUG("Examine %s failed", "CPUID"); return retval; } - retval = mem_ap_read_atomic_u32(armv8->debug_ap, + retval = mem_ap_read_u32(armv8->debug_ap, armv8->debug_base + CPUV8_DBG_MEMFEATURE0, &tmp0); - retval += mem_ap_read_atomic_u32(armv8->debug_ap, + retval += mem_ap_read_u32(armv8->debug_ap, armv8->debug_base + CPUV8_DBG_MEMFEATURE0 + 4, &tmp1); if (retval != ERROR_OK) { LOG_DEBUG("Examine %s failed", "Memory Model Type"); return retval; } - ttypr |= tmp1; - ttypr = (ttypr << 32) | tmp0; - - retval = mem_ap_read_atomic_u32(armv8->debug_ap, - armv8->debug_base + CPUV8_DBG_DBGFEATURE0, &tmp0); - retval += mem_ap_read_atomic_u32(armv8->debug_ap, - armv8->debug_base + CPUV8_DBG_DBGFEATURE0 + 4, &tmp1); + retval = mem_ap_read_u32(armv8->debug_ap, + armv8->debug_base + CPUV8_DBG_DBGFEATURE0, &tmp2); + retval += mem_ap_read_u32(armv8->debug_ap, + armv8->debug_base + CPUV8_DBG_DBGFEATURE0 + 4, &tmp3); if (retval != ERROR_OK) { LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1"); return retval; } - debug |= tmp1; - debug = (debug << 32) | tmp0; + + retval = dap_run(armv8->debug_ap->dap); + if (retval != ERROR_OK) { + LOG_ERROR("%s: examination failed\n", target_name(target)); + return retval; + } + + ttypr |= tmp1; + ttypr = (ttypr << 32) | tmp0; + debug |= tmp3; + debug = (debug << 32) | tmp2; LOG_DEBUG("cpuid = 0x%08" PRIx32, cpuid); LOG_DEBUG("ttypr = 0x%08" PRIx64, ttypr); -- 2.39.5