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-rw-r--r--plat/rockchip/rk3368/drivers/pmu/plat_pmu_macros.S17
-rw-r--r--plat/rockchip/rk3368/drivers/pmu/pmu.c373
-rw-r--r--plat/rockchip/rk3368/drivers/pmu/pmu.h207
3 files changed, 597 insertions, 0 deletions
diff --git a/plat/rockchip/rk3368/drivers/pmu/plat_pmu_macros.S b/plat/rockchip/rk3368/drivers/pmu/plat_pmu_macros.S
new file mode 100644
index 0000000..399f61c
--- /dev/null
+++ b/plat/rockchip/rk3368/drivers/pmu/plat_pmu_macros.S
@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <platform_def.h>
+
+.macro func_rockchip_clst_warmboot
+ /* Nothing to do for rk3368 */
+.endm
+
+.macro rockchip_clst_warmboot_data
+ /* Nothing to do for rk3368 */
+.endm
diff --git a/plat/rockchip/rk3368/drivers/pmu/pmu.c b/plat/rockchip/rk3368/drivers/pmu/pmu.c
new file mode 100644
index 0000000..e277a18
--- /dev/null
+++ b/plat/rockchip/rk3368/drivers/pmu/pmu.c
@@ -0,0 +1,373 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <errno.h>
+
+#include <platform_def.h>
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <drivers/delay_timer.h>
+#include <lib/mmio.h>
+#include <plat/common/platform.h>
+
+#include <ddr_rk3368.h>
+#include <plat_private.h>
+#include <pmu.h>
+#include <pmu_com.h>
+#include <rk3368_def.h>
+#include <soc.h>
+
+DEFINE_BAKERY_LOCK(rockchip_pd_lock);
+
+static uint32_t cpu_warm_boot_addr;
+
+void rk3368_flash_l2_b(void)
+{
+ uint32_t wait_cnt = 0;
+
+ regs_updata_bit_set(PMU_BASE + PMU_SFT_CON, pmu_sft_l2flsh_clst_b);
+ dsb();
+
+ while (!(mmio_read_32(PMU_BASE + PMU_CORE_PWR_ST)
+ & BIT(clst_b_l2_flsh_done))) {
+ wait_cnt++;
+ if (!(wait_cnt % MAX_WAIT_CONUT))
+ WARN("%s:reg %x,wait\n", __func__,
+ mmio_read_32(PMU_BASE + PMU_CORE_PWR_ST));
+ }
+
+ regs_updata_bit_clr(PMU_BASE + PMU_SFT_CON, pmu_sft_l2flsh_clst_b);
+}
+
+static inline int rk3368_pmu_bus_idle(uint32_t req, uint32_t idle)
+{
+ uint32_t mask = BIT(req);
+ uint32_t idle_mask = 0;
+ uint32_t idle_target = 0;
+ uint32_t val;
+ uint32_t wait_cnt = 0;
+
+ switch (req) {
+ case bus_ide_req_clst_l:
+ idle_mask = BIT(pmu_idle_ack_cluster_l);
+ idle_target = (idle << pmu_idle_ack_cluster_l);
+ break;
+
+ case bus_ide_req_clst_b:
+ idle_mask = BIT(pmu_idle_ack_cluster_b);
+ idle_target = (idle << pmu_idle_ack_cluster_b);
+ break;
+
+ case bus_ide_req_cxcs:
+ idle_mask = BIT(pmu_idle_ack_cxcs);
+ idle_target = ((!idle) << pmu_idle_ack_cxcs);
+ break;
+
+ case bus_ide_req_cci400:
+ idle_mask = BIT(pmu_idle_ack_cci400);
+ idle_target = ((!idle) << pmu_idle_ack_cci400);
+ break;
+
+ case bus_ide_req_gpu:
+ idle_mask = BIT(pmu_idle_ack_gpu) | BIT(pmu_idle_gpu);
+ idle_target = (idle << pmu_idle_ack_gpu) |
+ (idle << pmu_idle_gpu);
+ break;
+
+ case bus_ide_req_core:
+ idle_mask = BIT(pmu_idle_ack_core) | BIT(pmu_idle_core);
+ idle_target = (idle << pmu_idle_ack_core) |
+ (idle << pmu_idle_core);
+ break;
+
+ case bus_ide_req_bus:
+ idle_mask = BIT(pmu_idle_ack_bus) | BIT(pmu_idle_bus);
+ idle_target = (idle << pmu_idle_ack_bus) |
+ (idle << pmu_idle_bus);
+ break;
+ case bus_ide_req_dma:
+ idle_mask = BIT(pmu_idle_ack_dma) | BIT(pmu_idle_dma);
+ idle_target = (idle << pmu_idle_ack_dma) |
+ (idle << pmu_idle_dma);
+ break;
+
+ case bus_ide_req_peri:
+ idle_mask = BIT(pmu_idle_ack_peri) | BIT(pmu_idle_peri);
+ idle_target = (idle << pmu_idle_ack_peri) |
+ (idle << pmu_idle_peri);
+ break;
+
+ case bus_ide_req_video:
+ idle_mask = BIT(pmu_idle_ack_video) | BIT(pmu_idle_video);
+ idle_target = (idle << pmu_idle_ack_video) |
+ (idle << pmu_idle_video);
+ break;
+
+ case bus_ide_req_vio:
+ idle_mask = BIT(pmu_idle_ack_vio) | BIT(pmu_idle_vio);
+ idle_target = (pmu_idle_ack_vio) |
+ (idle << pmu_idle_vio);
+ break;
+
+ case bus_ide_req_alive:
+ idle_mask = BIT(pmu_idle_ack_alive) | BIT(pmu_idle_alive);
+ idle_target = (idle << pmu_idle_ack_alive) |
+ (idle << pmu_idle_alive);
+ break;
+
+ case bus_ide_req_pmu:
+ idle_mask = BIT(pmu_idle_ack_pmu) | BIT(pmu_idle_pmu);
+ idle_target = (idle << pmu_idle_ack_pmu) |
+ (idle << pmu_idle_pmu);
+ break;
+
+ case bus_ide_req_msch:
+ idle_mask = BIT(pmu_idle_ack_msch) | BIT(pmu_idle_msch);
+ idle_target = (idle << pmu_idle_ack_msch) |
+ (idle << pmu_idle_msch);
+ break;
+
+ case bus_ide_req_cci:
+ idle_mask = BIT(pmu_idle_ack_cci) | BIT(pmu_idle_cci);
+ idle_target = (idle << pmu_idle_ack_cci) |
+ (idle << pmu_idle_cci);
+ break;
+
+ default:
+ ERROR("%s: Unsupported the idle request\n", __func__);
+ break;
+ }
+
+ val = mmio_read_32(PMU_BASE + PMU_BUS_IDE_REQ);
+ if (idle)
+ val |= mask;
+ else
+ val &= ~mask;
+
+ mmio_write_32(PMU_BASE + PMU_BUS_IDE_REQ, val);
+
+ while ((mmio_read_32(PMU_BASE +
+ PMU_BUS_IDE_ST) & idle_mask) != idle_target) {
+ wait_cnt++;
+ if (!(wait_cnt % MAX_WAIT_CONUT))
+ WARN("%s:st=%x(%x)\n", __func__,
+ mmio_read_32(PMU_BASE + PMU_BUS_IDE_ST),
+ idle_mask);
+ }
+
+ return 0;
+}
+
+void pmu_scu_b_pwrup(void)
+{
+ regs_updata_bit_clr(PMU_BASE + PMU_SFT_CON, pmu_sft_acinactm_clst_b);
+ rk3368_pmu_bus_idle(bus_ide_req_clst_b, 0);
+}
+
+static void pmu_scu_b_pwrdn(void)
+{
+ uint32_t wait_cnt = 0;
+
+ if ((mmio_read_32(PMU_BASE + PMU_PWRDN_ST) &
+ PM_PWRDM_CPUSB_MSK) != PM_PWRDM_CPUSB_MSK) {
+ ERROR("%s: not all cpus is off\n", __func__);
+ return;
+ }
+
+ rk3368_flash_l2_b();
+
+ regs_updata_bit_set(PMU_BASE + PMU_SFT_CON, pmu_sft_acinactm_clst_b);
+
+ while (!(mmio_read_32(PMU_BASE +
+ PMU_CORE_PWR_ST) & BIT(clst_b_l2_wfi))) {
+ wait_cnt++;
+ if (!(wait_cnt % MAX_WAIT_CONUT))
+ ERROR("%s:wait cluster-b l2(%x)\n", __func__,
+ mmio_read_32(PMU_BASE + PMU_CORE_PWR_ST));
+ }
+ rk3368_pmu_bus_idle(bus_ide_req_clst_b, 1);
+}
+
+static void pmu_sleep_mode_config(void)
+{
+ uint32_t pwrmd_core, pwrmd_com;
+
+ pwrmd_core = BIT(pmu_mdcr_cpu0_pd) |
+ BIT(pmu_mdcr_scu_l_pd) |
+ BIT(pmu_mdcr_l2_flush) |
+ BIT(pmu_mdcr_l2_idle) |
+ BIT(pmu_mdcr_clr_clst_l) |
+ BIT(pmu_mdcr_clr_core) |
+ BIT(pmu_mdcr_clr_cci) |
+ BIT(pmu_mdcr_core_pd);
+
+ pwrmd_com = BIT(pmu_mode_en) |
+ BIT(pmu_mode_sref_enter) |
+ BIT(pmu_mode_pwr_off);
+
+ regs_updata_bit_set(PMU_BASE + PMU_WKUP_CFG2, pmu_cluster_l_wkup_en);
+ regs_updata_bit_set(PMU_BASE + PMU_WKUP_CFG2, pmu_cluster_b_wkup_en);
+ regs_updata_bit_clr(PMU_BASE + PMU_WKUP_CFG2, pmu_gpio_wkup_en);
+
+ mmio_write_32(PMU_BASE + PMU_PLLLOCK_CNT, CYCL_24M_CNT_MS(2));
+ mmio_write_32(PMU_BASE + PMU_PLLRST_CNT, CYCL_24M_CNT_US(100));
+ mmio_write_32(PMU_BASE + PMU_STABLE_CNT, CYCL_24M_CNT_MS(2));
+ mmio_write_32(PMU_BASE + PMU_PWRMD_CORE, pwrmd_core);
+ mmio_write_32(PMU_BASE + PMU_PWRMD_COM, pwrmd_com);
+ dsb();
+}
+
+static void pmu_set_sleep_mode(void)
+{
+ pmu_sleep_mode_config();
+ soc_sleep_config();
+ regs_updata_bit_set(PMU_BASE + PMU_PWRMD_CORE, pmu_mdcr_global_int_dis);
+ regs_updata_bit_set(PMU_BASE + PMU_SFT_CON, pmu_sft_glbl_int_dis_b);
+ pmu_scu_b_pwrdn();
+ mmio_write_32(SGRF_BASE + SGRF_SOC_CON(1),
+ ((uintptr_t)&pmu_cpuson_entrypoint >>
+ CPU_BOOT_ADDR_ALIGN) | CPU_BOOT_ADDR_WMASK);
+ mmio_write_32(SGRF_BASE + SGRF_SOC_CON(2),
+ ((uintptr_t)&pmu_cpuson_entrypoint >>
+ CPU_BOOT_ADDR_ALIGN) | CPU_BOOT_ADDR_WMASK);
+}
+
+static int cpus_id_power_domain(uint32_t cluster,
+ uint32_t cpu,
+ uint32_t pd_state,
+ uint32_t wfie_msk)
+{
+ uint32_t pd;
+ uint64_t mpidr;
+
+ if (cluster)
+ pd = PD_CPUB0 + cpu;
+ else
+ pd = PD_CPUL0 + cpu;
+
+ if (pmu_power_domain_st(pd) == pd_state)
+ return 0;
+
+ if (pd_state == pmu_pd_off) {
+ mpidr = (cluster << MPIDR_AFF1_SHIFT) | cpu;
+ if (check_cpu_wfie(mpidr, wfie_msk))
+ return -EINVAL;
+ }
+
+ return pmu_power_domain_ctr(pd, pd_state);
+}
+
+static void nonboot_cpus_off(void)
+{
+ uint32_t boot_cpu, boot_cluster, cpu;
+
+ boot_cpu = MPIDR_AFFLVL0_VAL(read_mpidr_el1());
+ boot_cluster = MPIDR_AFFLVL1_VAL(read_mpidr_el1());
+
+ /* turn off noboot cpus */
+ for (cpu = 0; cpu < PLATFORM_CLUSTER0_CORE_COUNT; cpu++) {
+ if (!boot_cluster && (cpu == boot_cpu))
+ continue;
+ cpus_id_power_domain(0, cpu, pmu_pd_off, CKECK_WFEI_MSK);
+ }
+
+ for (cpu = 0; cpu < PLATFORM_CLUSTER1_CORE_COUNT; cpu++) {
+ if (boot_cluster && (cpu == boot_cpu))
+ continue;
+ cpus_id_power_domain(1, cpu, pmu_pd_off, CKECK_WFEI_MSK);
+ }
+}
+
+void sram_save(void)
+{
+ /* TODO: support the sdram save for rk3368 SoCs*/
+}
+
+void sram_restore(void)
+{
+ /* TODO: support the sdram restore for rk3368 SoCs */
+}
+
+int rockchip_soc_cores_pwr_dm_on(unsigned long mpidr, uint64_t entrypoint)
+{
+ uint32_t cpu, cluster;
+ uint32_t cpuon_id;
+
+ cpu = MPIDR_AFFLVL0_VAL(mpidr);
+ cluster = MPIDR_AFFLVL1_VAL(mpidr);
+
+ /* Make sure the cpu is off,Before power up the cpu! */
+ cpus_id_power_domain(cluster, cpu, pmu_pd_off, CKECK_WFEI_MSK);
+
+ cpuon_id = (cluster * PLATFORM_CLUSTER0_CORE_COUNT) + cpu;
+ assert(cpuon_id < PLATFORM_CORE_COUNT);
+ assert(cpuson_flags[cpuon_id] == 0);
+ cpuson_flags[cpuon_id] = PMU_CPU_HOTPLUG;
+ cpuson_entry_point[cpuon_id] = entrypoint;
+
+ /* Switch boot addr to pmusram */
+ mmio_write_32(SGRF_BASE + SGRF_SOC_CON(1 + cluster),
+ (cpu_warm_boot_addr >> CPU_BOOT_ADDR_ALIGN) |
+ CPU_BOOT_ADDR_WMASK);
+ dsb();
+
+ cpus_id_power_domain(cluster, cpu, pmu_pd_on, CKECK_WFEI_MSK);
+
+ mmio_write_32(SGRF_BASE + SGRF_SOC_CON(1 + cluster),
+ (COLD_BOOT_BASE >> CPU_BOOT_ADDR_ALIGN) |
+ CPU_BOOT_ADDR_WMASK);
+
+ return 0;
+}
+
+int rockchip_soc_cores_pwr_dm_on_finish(void)
+{
+ return 0;
+}
+
+int rockchip_soc_sys_pwr_dm_resume(void)
+{
+ mmio_write_32(SGRF_BASE + SGRF_SOC_CON(1),
+ (COLD_BOOT_BASE >> CPU_BOOT_ADDR_ALIGN) |
+ CPU_BOOT_ADDR_WMASK);
+ mmio_write_32(SGRF_BASE + SGRF_SOC_CON(2),
+ (COLD_BOOT_BASE >> CPU_BOOT_ADDR_ALIGN) |
+ CPU_BOOT_ADDR_WMASK);
+ pm_plls_resume();
+ pmu_scu_b_pwrup();
+
+ return 0;
+}
+
+int rockchip_soc_sys_pwr_dm_suspend(void)
+{
+ nonboot_cpus_off();
+ pmu_set_sleep_mode();
+
+ return 0;
+}
+
+void rockchip_plat_mmu_el3(void)
+{
+ /* TODO: support the el3 for rk3368 SoCs */
+}
+
+void plat_rockchip_pmu_init(void)
+{
+ uint32_t cpu;
+
+ /* register requires 32bits mode, switch it to 32 bits */
+ cpu_warm_boot_addr = (uint64_t)platform_cpu_warmboot;
+
+ for (cpu = 0; cpu < PLATFORM_CORE_COUNT; cpu++)
+ cpuson_flags[cpu] = 0;
+
+ nonboot_cpus_off();
+ INFO("%s(%d): pd status %x\n", __func__, __LINE__,
+ mmio_read_32(PMU_BASE + PMU_PWRDN_ST));
+}
diff --git a/plat/rockchip/rk3368/drivers/pmu/pmu.h b/plat/rockchip/rk3368/drivers/pmu/pmu.h
new file mode 100644
index 0000000..b4d4807
--- /dev/null
+++ b/plat/rockchip/rk3368/drivers/pmu/pmu.h
@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PMU_H
+#define PMU_H
+
+/* Allocate sp reginon in pmusram */
+#define PSRAM_SP_SIZE 0x80
+#define PSRAM_SP_BOTTOM (PSRAM_SP_TOP - PSRAM_SP_SIZE)
+
+/*****************************************************************************
+ * pmu con,reg
+ *****************************************************************************/
+#define PMU_WKUP_CFG0 0x0
+#define PMU_WKUP_CFG1 0x4
+#define PMU_WKUP_CFG2 0x8
+#define PMU_TIMEOUT_CNT 0x7c
+#define PMU_PWRDN_CON 0xc
+#define PMU_PWRDN_ST 0x10
+#define PMU_CORE_PWR_ST 0x38
+
+#define PMU_PWRMD_CORE 0x14
+#define PMU_PWRMD_COM 0x18
+#define PMU_SFT_CON 0x1c
+#define PMU_BUS_IDE_REQ 0x3c
+#define PMU_BUS_IDE_ST 0x40
+#define PMU_OSC_CNT 0x48
+#define PMU_PLLLOCK_CNT 0x4c
+#define PMU_PLLRST_CNT 0x50
+#define PMU_STABLE_CNT 0x54
+#define PMU_DDRIO_PWR_CNT 0x58
+#define PMU_WKUPRST_CNT 0x5c
+
+enum pmu_powermode_core {
+ pmu_mdcr_global_int_dis = 0,
+ pmu_mdcr_core_src_gt,
+ pmu_mdcr_clr_cci,
+ pmu_mdcr_cpu0_pd,
+ pmu_mdcr_clr_clst_l = 4,
+ pmu_mdcr_clr_core,
+ pmu_mdcr_scu_l_pd,
+ pmu_mdcr_core_pd,
+ pmu_mdcr_l2_idle = 8,
+ pmu_mdcr_l2_flush
+};
+
+/*
+ * the shift of bits for cores status
+ */
+enum pmu_core_pwrst_shift {
+ clstl_cpu_wfe = 2,
+ clstl_cpu_wfi = 6,
+ clstb_cpu_wfe = 12,
+ clstb_cpu_wfi = 16
+};
+
+enum pmu_pdid {
+ PD_CPUL0 = 0,
+ PD_CPUL1,
+ PD_CPUL2,
+ PD_CPUL3,
+ PD_SCUL,
+ PD_CPUB0 = 5,
+ PD_CPUB1,
+ PD_CPUB2,
+ PD_CPUB3,
+ PD_SCUB = 9,
+ PD_PERI = 13,
+ PD_VIDEO,
+ PD_VIO,
+ PD_GPU0,
+ PD_GPU1,
+ PD_END
+};
+
+enum pmu_bus_ide {
+ bus_ide_req_clst_l = 0,
+ bus_ide_req_clst_b,
+ bus_ide_req_gpu,
+ bus_ide_req_core,
+ bus_ide_req_bus = 4,
+ bus_ide_req_dma,
+ bus_ide_req_peri,
+ bus_ide_req_video,
+ bus_ide_req_vio = 8,
+ bus_ide_req_res0,
+ bus_ide_req_cxcs,
+ bus_ide_req_alive,
+ bus_ide_req_pmu = 12,
+ bus_ide_req_msch,
+ bus_ide_req_cci,
+ bus_ide_req_cci400 = 15,
+ bus_ide_req_end
+};
+
+enum pmu_powermode_common {
+ pmu_mode_en = 0,
+ pmu_mode_res0,
+ pmu_mode_bus_pd,
+ pmu_mode_wkup_rst,
+ pmu_mode_pll_pd = 4,
+ pmu_mode_pwr_off,
+ pmu_mode_pmu_use_if,
+ pmu_mode_pmu_alive_use_if,
+ pmu_mode_osc_dis = 8,
+ pmu_mode_input_clamp,
+ pmu_mode_sref_enter,
+ pmu_mode_ddrc_gt,
+ pmu_mode_ddrio_ret = 12,
+ pmu_mode_ddrio_ret_deq,
+ pmu_mode_clr_pmu,
+ pmu_mode_clr_alive,
+ pmu_mode_clr_bus = 16,
+ pmu_mode_clr_dma,
+ pmu_mode_clr_msch,
+ pmu_mode_clr_peri,
+ pmu_mode_clr_video = 20,
+ pmu_mode_clr_vio,
+ pmu_mode_clr_gpu,
+ pmu_mode_clr_mcu,
+ pmu_mode_clr_cxcs = 24,
+ pmu_mode_clr_cci400,
+ pmu_mode_res1,
+ pmu_mode_res2,
+ pmu_mode_res3 = 28,
+ pmu_mode_mclst
+};
+
+enum pmu_core_power_st {
+ clst_l_cpu_wfe = 2,
+ clst_l_cpu_wfi = 6,
+ clst_b_l2_flsh_done = 10,
+ clst_b_l2_wfi = 11,
+ clst_b_cpu_wfe = 12,
+ clst_b_cpu_wfi = 16,
+ mcu_sleeping = 20,
+};
+
+enum pmu_sft_con {
+ pmu_sft_acinactm_clst_b = 5,
+ pmu_sft_l2flsh_clst_b,
+ pmu_sft_glbl_int_dis_b = 9,
+ pmu_sft_ddrio_ret_cfg = 11,
+};
+
+enum pmu_wkup_cfg2 {
+ pmu_cluster_l_wkup_en = 0,
+ pmu_cluster_b_wkup_en,
+ pmu_gpio_wkup_en,
+ pmu_sdio_wkup_en,
+ pmu_sdmmc_wkup_en,
+ pmu_sim_wkup_en,
+ pmu_timer_wkup_en,
+ pmu_usbdev_wkup_en,
+ pmu_sft_wkup_en,
+ pmu_wdt_mcu_wkup_en,
+ pmu_timeout_wkup_en,
+};
+
+enum pmu_bus_idle_st {
+ pmu_idle_ack_cluster_l = 0,
+ pmu_idle_ack_cluster_b,
+ pmu_idle_ack_gpu,
+ pmu_idle_ack_core,
+ pmu_idle_ack_bus,
+ pmu_idle_ack_dma,
+ pmu_idle_ack_peri,
+ pmu_idle_ack_video,
+ pmu_idle_ack_vio,
+ pmu_idle_ack_cci = 10,
+ pmu_idle_ack_msch,
+ pmu_idle_ack_alive,
+ pmu_idle_ack_pmu,
+ pmu_idle_ack_cxcs,
+ pmu_idle_ack_cci400,
+ pmu_inactive_cluster_l,
+ pmu_inactive_cluster_b,
+ pmu_idle_gpu,
+ pmu_idle_core,
+ pmu_idle_bus,
+ pmu_idle_dma,
+ pmu_idle_peri,
+ pmu_idle_video,
+ pmu_idle_vio,
+ pmu_idle_cci = 26,
+ pmu_idle_msch,
+ pmu_idle_alive,
+ pmu_idle_pmu,
+ pmu_active_cxcs,
+ pmu_active_cci,
+};
+
+#define PM_PWRDM_CPUSB_MSK (0xf << 5)
+
+#define CKECK_WFE_MSK 0x1
+#define CKECK_WFI_MSK 0x10
+#define CKECK_WFEI_MSK 0x11
+
+#define PD_CTR_LOOP 500
+#define CHK_CPU_LOOP 500
+
+#define MAX_WAIT_CONUT 1000
+
+#endif /* PMU_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 08:34:08 +0000