| // Copyright lowRISC contributors. |
| // Licensed under the Apache License, Version 2.0, see LICENSE for details. |
| // SPDX-License-Identifier: Apache-2.0 |
| { name: "PWRMGR", |
| clock_primary: "clk_i", |
| other_clock_list: [ "clk_slow_i" ] |
| reset_primary: "rst_ni", |
| other_reset_list: [ "rst_slow_ni" ] |
| bus_device: "tlul", |
| interrupt_list: [ |
| { name: "wakeup", desc: "Wake from low power state. See wake info for more details" }, |
| ], |
| |
| // Define flash_ctrl <-> flash_phy struct package |
| inter_signal_list: [ |
| { struct: "pwr_ast", |
| type: "req_rsp", |
| name: "pwr_ast", |
| act: "req", |
| package: "pwrmgr_pkg", |
| }, |
| |
| { struct: "pwr_rst", |
| type: "req_rsp", |
| name: "pwr_rst", |
| act: "req", |
| package: "pwrmgr_pkg", |
| }, |
| |
| { struct: "pwr_clk", |
| type: "req_rsp", |
| name: "pwr_clk", |
| act: "req", |
| package: "pwrmgr_pkg", |
| }, |
| |
| { struct: "pwr_otp", |
| type: "req_rsp", |
| name: "pwr_otp", |
| act: "req", |
| package: "pwrmgr_pkg", |
| }, |
| |
| { struct: "pwr_lc", |
| type: "req_rsp", |
| name: "pwr_lc", |
| act: "req", |
| package: "pwrmgr_pkg", |
| }, |
| |
| { struct: "pwr_flash", |
| type: "req_rsp", |
| name: "pwr_flash", |
| act: "req", |
| package: "pwrmgr_pkg", |
| }, |
| |
| { struct: "esc_tx", |
| type: "uni", |
| name: "esc_rst_tx", |
| act: "rcv", |
| package: "prim_esc_pkg", |
| }, |
| |
| { struct: "esc_rx", |
| type: "uni", |
| name: "esc_rst_rx", |
| act: "req", |
| package: "prim_esc_pkg", |
| }, |
| |
| { struct: "pwr_cpu", |
| type: "uni", |
| name: "pwr_cpu", |
| act: "rcv", |
| package: "pwrmgr_pkg", |
| }, |
| |
| { struct: "logic", |
| width: ${NumWkups}, |
| type: "uni", |
| name: "wakeups", |
| act: "rcv", |
| package: "", |
| }, |
| |
| { struct: "logic", |
| width: ${NumRstReqs}, |
| type: "uni", |
| name: "rstreqs", |
| act: "rcv", |
| package: "", |
| }, |
| |
| { struct: "logic", |
| type: "uni", |
| name: "strap", |
| act: "req", |
| package: "", |
| }, |
| |
| { struct: "logic", |
| type: "uni", |
| name: "low_power", |
| act: "req", |
| package: "", |
| }, |
| ], |
| |
| param_list: [ |
| { name: "NumWkups", |
| desc: "Number of wakeups", |
| type: "int", |
| default: "${NumWkups}", |
| local: "true" |
| }, |
| |
| % for wkup in Wkups: |
| { name: "${wkup['name'].upper()}_IDX", |
| desc: "Vector index for ${wkup['name']}, applies for WAKEUP_EN, WAKE_STATUS and WAKE_INFO", |
| type: "int", |
| default: "${loop.index}", |
| local: "true" |
| }, |
| |
| % endfor |
| |
| { name: "NumRstReqs", |
| desc: "Number of reset requets", |
| type: "int", |
| default: "${NumRstReqs}", |
| local: "true" |
| }, |
| ], |
| |
| regwidth: "32", |
| registers: [ |
| |
| { name: "CTRL_CFG_REGWEN", |
| swaccess: "ro", |
| hwaccess: "hwo", |
| hwext: "true", |
| desc: ''' |
| Controls the configurability of the !!CONTROL register. |
| |
| This register ensures the contents do not change once a low power hint and |
| WFI has occurred. |
| |
| It unlocks whenever a low power transition has completed (transition back to the |
| ACTIVE state) for any reason. |
| ''', |
| |
| fields: [ |
| { bits: "0", |
| name: "EN", |
| desc: ''' |
| Configuration enable. |
| |
| This bit defaults to 1 and is set to 0 by hardware when low power entry is initiated. |
| When the device transitions back from low power state to active state, this bit is set |
| back to 1 to allow software configuration of !!CONTROL |
| ''', |
| resval: "1", |
| }, |
| ] |
| tags: [// This regwen is completely under HW management and thus cannot be manipulated |
| // by software. |
| "excl:CsrNonInitTests:CsrExclCheck"] |
| }, |
| |
| |
| { name: "CONTROL", |
| desc: "Control register", |
| swaccess: "rw", |
| hwaccess: "hro", |
| regwen: "CTRL_CFG_REGWEN", |
| fields: [ |
| { bits: "0", |
| hwaccess: "hrw", |
| name: "LOW_POWER_HINT", |
| desc: ''' |
| The low power hint to power manager. |
| The hint is an indication for how the manager should treat the next WFI. |
| Once the power manager begins a low power transition, or if a valid reset request is registerd, |
| this bit is automatically cleared by HW. |
| ''' |
| resval: "0" |
| enum: [ |
| { value: "0", |
| name: "None", |
| desc: ''' |
| No low power intent |
| ''' |
| }, |
| { value: "1", |
| name: "Low Power", |
| desc: ''' |
| Next WFI should trigger low power entry |
| ''' |
| }, |
| ] |
| tags: [// The regwen for this reg is RO. CSR seq can't support to check this reg |
| "excl:CsrAllTests:CsrExclAll"] |
| }, |
| |
| { bits: "4", |
| name: "CORE_CLK_EN", |
| desc: "core clock enable during low power state", |
| resval: "0" |
| enum: [ |
| { value: "0", |
| name: "Disabled", |
| desc: ''' |
| Core clock disabled during low power state |
| ''' |
| }, |
| { value: "1", |
| name: "Enabled", |
| desc: ''' |
| Core clock enabled during low power state |
| ''' |
| }, |
| ] |
| }, |
| |
| { bits: "5", |
| name: "IO_CLK_EN", |
| desc: "IO clock enable during low power state", |
| resval: "0" |
| enum: [ |
| { value: "0", |
| name: "Disabled", |
| desc: ''' |
| IO clock disabled during low power state |
| ''' |
| }, |
| { value: "1", |
| name: "Enabled", |
| desc: ''' |
| IO clock enabled during low power state |
| ''' |
| }, |
| ] |
| }, |
| |
| { bits: "6", |
| name: "USB_CLK_EN_LP", |
| desc: "USB clock enable during low power state", |
| resval: "0", |
| enum: [ |
| { value: "0", |
| name: "Disabled", |
| desc: ''' |
| USB clock disabled during low power state |
| ''' |
| }, |
| { value: "1", |
| name: "Enabled", |
| desc: ''' |
| USB clock enabled during low power state |
| ''' |
| }, |
| ] |
| }, |
| |
| { bits: "7", |
| name: "USB_CLK_EN_ACTIVE", |
| desc: "USB clock enable during active power state", |
| resval: "1" |
| enum: [ |
| { value: "0", |
| name: "Disabled", |
| desc: ''' |
| USB clock disabled during active power state |
| ''' |
| }, |
| { value: "1", |
| name: "Enabled", |
| desc: ''' |
| USB clock enabled during active power state |
| ''' |
| }, |
| ] |
| }, |
| |
| { bits: "8", |
| name: "MAIN_PD_N", |
| desc: "Active low, main power domain power down", |
| resval: "1" |
| enum: [ |
| { value: "0", |
| name: "Power down", |
| desc: ''' |
| Main power domain is powered down during low power state. |
| Note this signal is active low. |
| ''' |
| }, |
| { value: "1", |
| name: "Power up", |
| desc: ''' |
| Main power domain is kept powered during low power state |
| Note this signal is active low. |
| ''' |
| }, |
| ] |
| }, |
| |
| |
| ], |
| }, |
| |
| { name: "CFG_CDC_SYNC", |
| swaccess: "rw", |
| hwaccess: "hrw", |
| hwqe: "true", |
| desc: ''' |
| The configuration registers CONTROL, WAKEUP_EN, RESET_EN are all written in the |
| fast clock domain but used in the slow clock domain. |
| |
| The configuration are not propogated across the clock boundary until this |
| register is triggered and read. See fields below for more details |
| ''', |
| |
| fields: [ |
| { bits: "0", |
| name: "SYNC", |
| desc: ''' |
| Configuration sync. When this bit is written to 1, a sync pulse is generated. When |
| the sync completes, this bit then self clears. |
| |
| Software should write this bit to 1, wait for it to clear, before assuming the slow clock |
| domain has assumed the programmaed values. |
| ''', |
| resval: "0", |
| }, |
| ] |
| tags: [// This bit triggers a payload synchronization and self clears when complete. |
| // Do not write this bit as there will be side effects and the value will not persist |
| "excl:CsrNonInitTests:CsrExclCheck"] |
| }, |
| |
| { name: "WAKEUP_EN_REGWEN", |
| desc: "Configuration enable for wakeup register", |
| swaccess: "rw0c", |
| hwaccess: "none", |
| fields: [ |
| { bits: "0", |
| resval: "1" |
| name: "EN", |
| desc: ''' |
| When 1, WAKEUP register can be configured. |
| When 0, WAKEUP register cannot be configured. |
| ''', |
| }, |
| ] |
| }, |
| |
| { multireg: |
| { name: "WAKEUP_EN", |
| desc: "Bit mask for enabled wakeups", |
| swaccess: "rw", |
| hwaccess: "hro", |
| regwen: "WAKEUP_EN_REGWEN", |
| resval: "0" |
| cname: "wakeup_en", |
| count: "NumWkups" |
| fields: [ |
| { bits: "0", |
| name: "EN", |
| desc: ''' |
| Whenever a particular bit is set to 1, that wakeup is also enabled. |
| Whenever a particular bit is set to 0, that wakeup cannot wake the device from low power. |
| ''', |
| }, |
| ] |
| }, |
| }, |
| |
| { multireg: |
| { name: "WAKE_STATUS", |
| desc: "A read only register of all current wake requests post enable mask", |
| swaccess: "ro", |
| hwaccess: "hwo", |
| resval: "0" |
| cname: "wake_status", |
| count: "NumWkups", |
| tags: [// Cannot auto-predict current wake request status |
| "excl:CsrNonInitTests:CsrExclWriteCheck"], |
| fields: [ |
| { bits: "0", |
| name: "VAL", |
| desc: ''' |
| Current value of wake requests |
| ''', |
| }, |
| ] |
| }, |
| }, |
| |
| { name: "RESET_EN_REGWEN", |
| desc: "Configuration enable for reset register", |
| swaccess: "rw0c", |
| hwaccess: "none", |
| fields: [ |
| { bits: "0", |
| resval: "1" |
| name: "EN", |
| desc: ''' |
| When 1, RESET register can be configured. |
| When 0, RESET register cannot be configured. |
| ''', |
| }, |
| ] |
| }, |
| |
| { multireg: |
| { name: "RESET_EN", |
| desc: "Bit mask for enabled reset requests", |
| swaccess: "rw", |
| hwaccess: "hro", |
| regwen: "RESET_EN_REGWEN", |
| resval: "0" |
| cname: "rstreq_en", |
| count: "NumRstReqs" |
| fields: [ |
| { bits: "0", |
| name: "EN", |
| desc: ''' |
| Whenever a particular bit is set to 1, that reset request is enabled. |
| Whenever a particular bit is set to 0, that reset request cannot reset the device. |
| ''', |
| }, |
| ] |
| }, |
| }, |
| |
| { multireg: |
| { name: "RESET_STATUS", |
| desc: "A read only register of all current reset requests post enable mask", |
| swaccess: "ro", |
| hwaccess: "hwo", |
| resval: "0" |
| cname: "reset_status", |
| count: "NumRstReqs", |
| fields: [ |
| { bits: "0", |
| name: "VAL", |
| desc: ''' |
| Current value of reset request |
| ''', |
| }, |
| ] |
| }, |
| }, |
| |
| { name: "ESCALATE_RESET_STATUS", |
| desc: "A read only register of escalation reset request", |
| swaccess: "ro", |
| hwaccess: "hwo", |
| resval: "0" |
| fields: [ |
| { bits: "0", |
| name: "VAL", |
| desc: ''' |
| When 1, an escalation reset has been seen. |
| When 0, there is no escalation reset. |
| ''', |
| }, |
| ] |
| }, |
| |
| { name: "WAKE_INFO_CAPTURE_DIS", |
| desc: "Indicates which functions caused the chip to wakeup", |
| swaccess: "rw", |
| hwaccess: "hro", |
| resval: "0" |
| fields: [ |
| { bits: "0", |
| name: "VAL", |
| desc: ''' |
| When written to 1, this actively suppresses the wakeup info capture. |
| When written to 0, wakeup info capture timing is controlled by HW. |
| ''', |
| }, |
| ] |
| }, |
| |
| { name: "WAKE_INFO", |
| desc: ''' |
| Indicates which functions caused the chip to wakeup. |
| The wake info recording begins whenever the device begins a valid low power entry. |
| |
| This capture is continued until it is explicitly disabled through WAKE_INFO_CAPTURE_DIS. |
| This means it is possible to capture multiple wakeup reasons. |
| ''', |
| swaccess: "rw1c", |
| hwaccess: "hrw", |
| hwext: "true", |
| hwqe: "true", |
| resval: "0" |
| fields: [ |
| { bits: "${NumWkups-1}:0", |
| name: "REASONS", |
| desc: "Various peripheral wake reasons" |
| }, |
| { bits: "${NumWkups}", |
| name: "FALL_THROUGH", |
| desc: ''' |
| The fall through wakeup reason indicates that despite setting a WFI and providing a low power |
| hint, an interrupt arrived at just the right time to break the executing core out of WFI. |
| |
| The power manager detects this condition, halts low power entry and reports as a wakeup reason |
| ''', |
| }, |
| { bits: "${NumWkups+1}", |
| name: "ABORT", |
| desc: ''' |
| The abort wakeup reason indicates that despite setting a WFI and providing a low power |
| hint, an active flash / lifecycle / otp transaction was ongoing when the power controller |
| attempted to initiate low power entry. |
| |
| The power manager detects this condition, halts low power entry and reports as a wakeup reason |
| ''', |
| }, |
| ] |
| tags: [// This regwen is completely under HW management and thus cannot be manipulated |
| // by software. |
| "excl:CsrNonInitTests:CsrExclCheck"] |
| }, |
| ] |
| } |
