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# SPDX-License-Identifier: GPL-2.0-or-later
#
# Source the ESP common configuration file.
source [find target/esp_common.cfg]
# Target specific global variables
set _CHIPNAME "riscv"
set _CPUTAPID 0x00005c25
set _ESP_ARCH "riscv"
set _ONLYCPU 1
set _ESP_SMP_TARGET 0
set _ESP_SMP_BREAK 0
set _ESP_EFUSE_MAC_ADDR_REG 0x60008844
# Target specific functions should be implemented for each riscv chips.
proc riscv_wdt_disable { } {
# Halt event can occur during config phase (before "init" is done).
# Ignore it since mww commands don't work at that time.
if { [string compare [command mode] config] == 0 } {
return
}
# Timer Group 0 & 1 WDTs
mww 0x6001f064 0x50D83AA1
mww 0x6001F048 0
mww 0x60020064 0x50D83AA1
mww 0x60020048 0
# RTC WDT
mww 0x600080a8 0x50D83AA1
mww 0x60008090 0
# SWD
mww 0x600080b0 0x8F1D312A
mww 0x600080ac 0x84B00000
}
# This is almost identical with the esp32c2_soc_reset.
# Will be refactored with the other common settings.
proc riscv_soc_reset { } {
global _RISCV_DMCONTROL
# This procedure does "digital system reset", i.e. resets
# all the peripherals except for the RTC block.
# It is called from reset-assert-post target event callback,
# after assert_reset procedure was called.
# Since we need the hart to to execute a write to RTC_CNTL_SW_SYS_RST,
# temporarily take it out of reset. Save the dmcontrol state before
# doing so.
riscv dmi_write $_RISCV_DMCONTROL 0x80000001
# Trigger the reset
mww 0x60008000 0x9c00a000
# Workaround for stuck in cpu start during calibration.
# By writing zero to TIMG_RTCCALICFG_REG, we are disabling calibration
mww 0x6001F068 0
# Wait for the reset to happen
sleep 10
poll
# Disable the watchdogs again
riscv_wdt_disable
# Here debugger reads allresumeack and allhalted bits as set (0x330a2)
# We will clean allhalted state by resuming the core.
riscv dmi_write $_RISCV_DMCONTROL 0x40000001
# Put the hart back into reset state. Note that we need to keep haltreq set.
riscv dmi_write $_RISCV_DMCONTROL 0x80000003
}
proc riscv_memprot_is_enabled { } {
# IRAM0 PMS lock, SENSITIVE_CORE_X_IRAM0_PMS_CONSTRAIN_0_REG
if { [get_mmr_bit 0x600C10A8 0] != 0 } {
return 1
}
# DRAM0 PMS lock, SENSITIVE_CORE_X_DRAM0_PMS_CONSTRAIN_0_REG
if { [get_mmr_bit 0x600C10C0 0] != 0 } {
return 1
}
return 0
}
create_esp_target $_ESP_ARCH
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