diff options
Diffstat (limited to 'src/target/arm_cti.c')
| -rw-r--r-- | src/target/arm_cti.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/target/arm_cti.c b/src/target/arm_cti.c new file mode 100644 index 0000000..75169b2 --- /dev/null +++ b/src/target/arm_cti.c @@ -0,0 +1,148 @@ +/*************************************************************************** + * Copyright (C) 2016 by Matthias Welwarsky * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * * + ***************************************************************************/ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <stdlib.h> +#include <stdint.h> +#include "target/arm_adi_v5.h" +#include "target/arm_cti.h" +#include "target/target.h" +#include "helper/time_support.h" + +struct arm_cti { + uint32_t base; + struct adiv5_ap *ap; +}; + +struct arm_cti *arm_cti_create(struct adiv5_ap *ap, uint32_t base) +{ + struct arm_cti *self = calloc(1, sizeof(struct arm_cti)); + if (!self) + return NULL; + + self->base = base; + self->ap = ap; + return self; +} + +static int arm_cti_mod_reg_bits(struct arm_cti *self, unsigned int reg, uint32_t mask, uint32_t value) +{ + uint32_t tmp; + + /* Read register */ + int retval = mem_ap_read_atomic_u32(self->ap, self->base + reg, &tmp); + if (ERROR_OK != retval) + return retval; + + /* clear bitfield */ + tmp &= ~mask; + /* put new value */ + tmp |= value & mask; + + /* write new value */ + return mem_ap_write_atomic_u32(self->ap, self->base + reg, tmp); +} + +int arm_cti_enable(struct arm_cti *self, bool enable) +{ + uint32_t val = enable ? 1 : 0; + + return mem_ap_write_atomic_u32(self->ap, self->base + CTI_CTR, val); +} + +int arm_cti_ack_events(struct arm_cti *self, uint32_t event) +{ + int retval; + uint32_t tmp; + + retval = mem_ap_write_atomic_u32(self->ap, self->base + CTI_INACK, event); + if (retval == ERROR_OK) { + int64_t then = timeval_ms(); + for (;;) { + retval = mem_ap_read_atomic_u32(self->ap, self->base + CTI_TROUT_STATUS, &tmp); + if (retval != ERROR_OK) + break; + if ((tmp & event) == 0) + break; + if (timeval_ms() > then + 1000) { + LOG_ERROR("timeout waiting for target"); + retval = ERROR_TARGET_TIMEOUT; + break; + } + } + } + + return retval; +} + +int arm_cti_gate_channel(struct arm_cti *self, uint32_t channel) +{ + if (channel > 31) + return ERROR_COMMAND_ARGUMENT_INVALID; + + return arm_cti_mod_reg_bits(self, CTI_GATE, CTI_CHNL(channel), 0); +} + +int arm_cti_ungate_channel(struct arm_cti *self, uint32_t channel) +{ + if (channel > 31) + return ERROR_COMMAND_ARGUMENT_INVALID; + + return arm_cti_mod_reg_bits(self, CTI_GATE, CTI_CHNL(channel), 0xFFFFFFFF); +} + +int arm_cti_write_reg(struct arm_cti *self, unsigned int reg, uint32_t value) +{ + return mem_ap_write_atomic_u32(self->ap, self->base + reg, value); +} + +int arm_cti_read_reg(struct arm_cti *self, unsigned int reg, uint32_t *p_value) +{ + if (p_value == NULL) + return ERROR_COMMAND_ARGUMENT_INVALID; + + return mem_ap_read_atomic_u32(self->ap, self->base + reg, p_value); +} + +int arm_cti_pulse_channel(struct arm_cti *self, uint32_t channel) +{ + if (channel > 31) + return ERROR_COMMAND_ARGUMENT_INVALID; + + return arm_cti_write_reg(self, CTI_APPPULSE, CTI_CHNL(channel)); +} + +int arm_cti_set_channel(struct arm_cti *self, uint32_t channel) +{ + if (channel > 31) + return ERROR_COMMAND_ARGUMENT_INVALID; + + return arm_cti_write_reg(self, CTI_APPSET, CTI_CHNL(channel)); +} + +int arm_cti_clear_channel(struct arm_cti *self, uint32_t channel) +{ + if (channel > 31) + return ERROR_COMMAND_ARGUMENT_INVALID; + + return arm_cti_write_reg(self, CTI_APPCLEAR, CTI_CHNL(channel)); +} |