diff options
Diffstat (limited to 'hw/timer/exynos4210_mct.c')
| -rw-r--r-- | hw/timer/exynos4210_mct.c | 1568 |
1 files changed, 1568 insertions, 0 deletions
diff --git a/hw/timer/exynos4210_mct.c b/hw/timer/exynos4210_mct.c new file mode 100644 index 000000000..d0e534399 --- /dev/null +++ b/hw/timer/exynos4210_mct.c @@ -0,0 +1,1568 @@ +/* + * Samsung exynos4210 Multi Core timer + * + * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. + * All rights reserved. + * + * Evgeny Voevodin <e.voevodin@samsung.com> + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +/* + * Global Timer: + * + * Consists of two timers. First represents Free Running Counter and second + * is used to measure interval from FRC to nearest comparator. + * + * 0 UINT64_MAX + * | timer0 | + * | <-------------------------------------------------------------- | + * | --------------------------------------------frc---------------> | + * |______________________________________________|__________________| + * CMP0 CMP1 CMP2 | CMP3 + * __| |_ + * | timer1 | + * | -------------> | + * frc CMPx + * + * Problem: when implementing global timer as is, overflow arises. + * next_time = cur_time + period * count; + * period and count are 64 bits width. + * Lets arm timer for MCT_GT_COUNTER_STEP count and update internal G_CNT + * register during each event. + * + * Problem: both timers need to be implemented using MCT_XT_COUNTER_STEP because + * local timer contains two counters: TCNT and ICNT. TCNT == 0 -> ICNT--. + * IRQ is generated when ICNT riches zero. Implementation where TCNT == 0 + * generates IRQs suffers from too frequently events. Better to have one + * uint64_t counter equal to TCNT*ICNT and arm ptimer.c for a minimum(TCNT*ICNT, + * MCT_GT_COUNTER_STEP); (yes, if target tunes ICNT * TCNT to be too low values, + * there is no way to avoid frequently events). + */ + +#include "qemu/osdep.h" +#include "qemu/log.h" +#include "hw/sysbus.h" +#include "migration/vmstate.h" +#include "qemu/timer.h" +#include "qemu/module.h" +#include "hw/ptimer.h" + +#include "hw/arm/exynos4210.h" +#include "hw/irq.h" +#include "qom/object.h" + +//#define DEBUG_MCT + +#ifdef DEBUG_MCT +#define DPRINTF(fmt, ...) \ + do { fprintf(stdout, "MCT: [%24s:%5d] " fmt, __func__, __LINE__, \ + ## __VA_ARGS__); } while (0) +#else +#define DPRINTF(fmt, ...) do {} while (0) +#endif + +#define MCT_CFG 0x000 +#define G_CNT_L 0x100 +#define G_CNT_U 0x104 +#define G_CNT_WSTAT 0x110 +#define G_COMP0_L 0x200 +#define G_COMP0_U 0x204 +#define G_COMP0_ADD_INCR 0x208 +#define G_COMP1_L 0x210 +#define G_COMP1_U 0x214 +#define G_COMP1_ADD_INCR 0x218 +#define G_COMP2_L 0x220 +#define G_COMP2_U 0x224 +#define G_COMP2_ADD_INCR 0x228 +#define G_COMP3_L 0x230 +#define G_COMP3_U 0x234 +#define G_COMP3_ADD_INCR 0x238 +#define G_TCON 0x240 +#define G_INT_CSTAT 0x244 +#define G_INT_ENB 0x248 +#define G_WSTAT 0x24C +#define L0_TCNTB 0x300 +#define L0_TCNTO 0x304 +#define L0_ICNTB 0x308 +#define L0_ICNTO 0x30C +#define L0_FRCNTB 0x310 +#define L0_FRCNTO 0x314 +#define L0_TCON 0x320 +#define L0_INT_CSTAT 0x330 +#define L0_INT_ENB 0x334 +#define L0_WSTAT 0x340 +#define L1_TCNTB 0x400 +#define L1_TCNTO 0x404 +#define L1_ICNTB 0x408 +#define L1_ICNTO 0x40C +#define L1_FRCNTB 0x410 +#define L1_FRCNTO 0x414 +#define L1_TCON 0x420 +#define L1_INT_CSTAT 0x430 +#define L1_INT_ENB 0x434 +#define L1_WSTAT 0x440 + +#define MCT_CFG_GET_PRESCALER(x) ((x) & 0xFF) +#define MCT_CFG_GET_DIVIDER(x) (1 << ((x) >> 8 & 7)) + +#define GET_G_COMP_IDX(offset) (((offset) - G_COMP0_L) / 0x10) +#define GET_G_COMP_ADD_INCR_IDX(offset) (((offset) - G_COMP0_ADD_INCR) / 0x10) + +#define G_COMP_L(x) (G_COMP0_L + (x) * 0x10) +#define G_COMP_U(x) (G_COMP0_U + (x) * 0x10) + +#define G_COMP_ADD_INCR(x) (G_COMP0_ADD_INCR + (x) * 0x10) + +/* MCT bits */ +#define G_TCON_COMP_ENABLE(x) (1 << 2 * (x)) +#define G_TCON_AUTO_ICREMENT(x) (1 << (2 * (x) + 1)) +#define G_TCON_TIMER_ENABLE (1 << 8) + +#define G_INT_ENABLE(x) (1 << (x)) +#define G_INT_CSTAT_COMP(x) (1 << (x)) + +#define G_CNT_WSTAT_L 1 +#define G_CNT_WSTAT_U 2 + +#define G_WSTAT_COMP_L(x) (1 << 4 * (x)) +#define G_WSTAT_COMP_U(x) (1 << ((4 * (x)) + 1)) +#define G_WSTAT_COMP_ADDINCR(x) (1 << ((4 * (x)) + 2)) +#define G_WSTAT_TCON_WRITE (1 << 16) + +#define GET_L_TIMER_IDX(offset) ((((offset) & 0xF00) - L0_TCNTB) / 0x100) +#define GET_L_TIMER_CNT_REG_IDX(offset, lt_i) \ + (((offset) - (L0_TCNTB + 0x100 * (lt_i))) >> 2) + +#define L_ICNTB_MANUAL_UPDATE (1 << 31) + +#define L_TCON_TICK_START (1) +#define L_TCON_INT_START (1 << 1) +#define L_TCON_INTERVAL_MODE (1 << 2) +#define L_TCON_FRC_START (1 << 3) + +#define L_INT_CSTAT_INTCNT (1 << 0) +#define L_INT_CSTAT_FRCCNT (1 << 1) + +#define L_INT_INTENB_ICNTEIE (1 << 0) +#define L_INT_INTENB_FRCEIE (1 << 1) + +#define L_WSTAT_TCNTB_WRITE (1 << 0) +#define L_WSTAT_ICNTB_WRITE (1 << 1) +#define L_WSTAT_FRCCNTB_WRITE (1 << 2) +#define L_WSTAT_TCON_WRITE (1 << 3) + +enum LocalTimerRegCntIndexes { + L_REG_CNT_TCNTB, + L_REG_CNT_TCNTO, + L_REG_CNT_ICNTB, + L_REG_CNT_ICNTO, + L_REG_CNT_FRCCNTB, + L_REG_CNT_FRCCNTO, + + L_REG_CNT_AMOUNT +}; + +#define MCT_SFR_SIZE 0x444 + +#define MCT_GT_CMP_NUM 4 + +#define MCT_GT_COUNTER_STEP 0x100000000ULL +#define MCT_LT_COUNTER_STEP 0x100000000ULL +#define MCT_LT_CNT_LOW_LIMIT 0x100 + +/* global timer */ +typedef struct { + qemu_irq irq[MCT_GT_CMP_NUM]; + + struct gregs { + uint64_t cnt; + uint32_t cnt_wstat; + uint32_t tcon; + uint32_t int_cstat; + uint32_t int_enb; + uint32_t wstat; + uint64_t comp[MCT_GT_CMP_NUM]; + uint32_t comp_add_incr[MCT_GT_CMP_NUM]; + } reg; + + uint64_t count; /* Value FRC was armed with */ + int32_t curr_comp; /* Current comparator FRC is running to */ + + ptimer_state *ptimer_frc; /* FRC timer */ + +} Exynos4210MCTGT; + +/* local timer */ +typedef struct { + int id; /* timer id */ + qemu_irq irq; /* local timer irq */ + + struct tick_timer { + uint32_t cnt_run; /* cnt timer is running */ + uint32_t int_run; /* int timer is running */ + + uint32_t last_icnto; + uint32_t last_tcnto; + uint32_t tcntb; /* initial value for TCNTB */ + uint32_t icntb; /* initial value for ICNTB */ + + /* for step mode */ + uint64_t distance; /* distance to count to the next event */ + uint64_t progress; /* progress when counting by steps */ + uint64_t count; /* count to arm timer with */ + + ptimer_state *ptimer_tick; /* timer for tick counter */ + } tick_timer; + + /* use ptimer.c to represent count down timer */ + + ptimer_state *ptimer_frc; /* timer for free running counter */ + + /* registers */ + struct lregs { + uint32_t cnt[L_REG_CNT_AMOUNT]; + uint32_t tcon; + uint32_t int_cstat; + uint32_t int_enb; + uint32_t wstat; + } reg; + +} Exynos4210MCTLT; + +#define TYPE_EXYNOS4210_MCT "exynos4210.mct" +OBJECT_DECLARE_SIMPLE_TYPE(Exynos4210MCTState, EXYNOS4210_MCT) + +struct Exynos4210MCTState { + SysBusDevice parent_obj; + + MemoryRegion iomem; + + /* Registers */ + uint32_t reg_mct_cfg; + + Exynos4210MCTLT l_timer[2]; + Exynos4210MCTGT g_timer; + + uint32_t freq; /* all timers tick frequency, TCLK */ +}; + +/*** VMState ***/ +static const VMStateDescription vmstate_tick_timer = { + .name = "exynos4210.mct.tick_timer", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(cnt_run, struct tick_timer), + VMSTATE_UINT32(int_run, struct tick_timer), + VMSTATE_UINT32(last_icnto, struct tick_timer), + VMSTATE_UINT32(last_tcnto, struct tick_timer), + VMSTATE_UINT32(tcntb, struct tick_timer), + VMSTATE_UINT32(icntb, struct tick_timer), + VMSTATE_UINT64(distance, struct tick_timer), + VMSTATE_UINT64(progress, struct tick_timer), + VMSTATE_UINT64(count, struct tick_timer), + VMSTATE_PTIMER(ptimer_tick, struct tick_timer), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_lregs = { + .name = "exynos4210.mct.lregs", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32_ARRAY(cnt, struct lregs, L_REG_CNT_AMOUNT), + VMSTATE_UINT32(tcon, struct lregs), + VMSTATE_UINT32(int_cstat, struct lregs), + VMSTATE_UINT32(int_enb, struct lregs), + VMSTATE_UINT32(wstat, struct lregs), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_exynos4210_mct_lt = { + .name = "exynos4210.mct.lt", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_INT32(id, Exynos4210MCTLT), + VMSTATE_STRUCT(tick_timer, Exynos4210MCTLT, 0, + vmstate_tick_timer, + struct tick_timer), + VMSTATE_PTIMER(ptimer_frc, Exynos4210MCTLT), + VMSTATE_STRUCT(reg, Exynos4210MCTLT, 0, + vmstate_lregs, + struct lregs), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_gregs = { + .name = "exynos4210.mct.lregs", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT64(cnt, struct gregs), + VMSTATE_UINT32(cnt_wstat, struct gregs), + VMSTATE_UINT32(tcon, struct gregs), + VMSTATE_UINT32(int_cstat, struct gregs), + VMSTATE_UINT32(int_enb, struct gregs), + VMSTATE_UINT32(wstat, struct gregs), + VMSTATE_UINT64_ARRAY(comp, struct gregs, MCT_GT_CMP_NUM), + VMSTATE_UINT32_ARRAY(comp_add_incr, struct gregs, + MCT_GT_CMP_NUM), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_exynos4210_mct_gt = { + .name = "exynos4210.mct.lt", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_STRUCT(reg, Exynos4210MCTGT, 0, vmstate_gregs, + struct gregs), + VMSTATE_UINT64(count, Exynos4210MCTGT), + VMSTATE_INT32(curr_comp, Exynos4210MCTGT), + VMSTATE_PTIMER(ptimer_frc, Exynos4210MCTGT), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_exynos4210_mct_state = { + .name = "exynos4210.mct", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(reg_mct_cfg, Exynos4210MCTState), + VMSTATE_STRUCT_ARRAY(l_timer, Exynos4210MCTState, 2, 0, + vmstate_exynos4210_mct_lt, Exynos4210MCTLT), + VMSTATE_STRUCT(g_timer, Exynos4210MCTState, 0, + vmstate_exynos4210_mct_gt, Exynos4210MCTGT), + VMSTATE_UINT32(freq, Exynos4210MCTState), + VMSTATE_END_OF_LIST() + } +}; + +static void exynos4210_mct_update_freq(Exynos4210MCTState *s); + +/* + * Set counter of FRC global timer. + * Must be called within exynos4210_gfrc_tx_begin/commit block. + */ +static void exynos4210_gfrc_set_count(Exynos4210MCTGT *s, uint64_t count) +{ + s->count = count; + DPRINTF("global timer frc set count 0x%llx\n", count); + ptimer_set_count(s->ptimer_frc, count); +} + +/* + * Get counter of FRC global timer. + */ +static uint64_t exynos4210_gfrc_get_count(Exynos4210MCTGT *s) +{ + uint64_t count = 0; + count = ptimer_get_count(s->ptimer_frc); + count = s->count - count; + return s->reg.cnt + count; +} + +/* + * Stop global FRC timer + * Must be called within exynos4210_gfrc_tx_begin/commit block. + */ +static void exynos4210_gfrc_stop(Exynos4210MCTGT *s) +{ + DPRINTF("global timer frc stop\n"); + + ptimer_stop(s->ptimer_frc); +} + +/* + * Start global FRC timer + * Must be called within exynos4210_gfrc_tx_begin/commit block. + */ +static void exynos4210_gfrc_start(Exynos4210MCTGT *s) +{ + DPRINTF("global timer frc start\n"); + + ptimer_run(s->ptimer_frc, 1); +} + +/* + * Start ptimer transaction for global FRC timer; this is just for + * consistency with the way we wrap operations like stop and run. + */ +static void exynos4210_gfrc_tx_begin(Exynos4210MCTGT *s) +{ + ptimer_transaction_begin(s->ptimer_frc); +} + +/* Commit ptimer transaction for global FRC timer. */ +static void exynos4210_gfrc_tx_commit(Exynos4210MCTGT *s) +{ + ptimer_transaction_commit(s->ptimer_frc); +} + +/* + * Find next nearest Comparator. If current Comparator value equals to other + * Comparator value, skip them both + */ +static int32_t exynos4210_gcomp_find(Exynos4210MCTState *s) +{ + int res; + int i; + int enabled; + uint64_t min; + int min_comp_i; + uint64_t gfrc; + uint64_t distance; + uint64_t distance_min; + int comp_i; + + /* get gfrc count */ + gfrc = exynos4210_gfrc_get_count(&s->g_timer); + + min = UINT64_MAX; + distance_min = UINT64_MAX; + comp_i = MCT_GT_CMP_NUM; + min_comp_i = MCT_GT_CMP_NUM; + enabled = 0; + + /* lookup for nearest comparator */ + for (i = 0; i < MCT_GT_CMP_NUM; i++) { + + if (s->g_timer.reg.tcon & G_TCON_COMP_ENABLE(i)) { + + enabled = 1; + + if (s->g_timer.reg.comp[i] > gfrc) { + /* Comparator is upper then FRC */ + distance = s->g_timer.reg.comp[i] - gfrc; + + if (distance <= distance_min) { + distance_min = distance; + comp_i = i; + } + } else { + /* Comparator is below FRC, find the smallest */ + + if (s->g_timer.reg.comp[i] <= min) { + min = s->g_timer.reg.comp[i]; + min_comp_i = i; + } + } + } + } + + if (!enabled) { + /* All Comparators disabled */ + res = -1; + } else if (comp_i < MCT_GT_CMP_NUM) { + /* Found upper Comparator */ + res = comp_i; + } else { + /* All Comparators are below or equal to FRC */ + res = min_comp_i; + } + + DPRINTF("found comparator %d: comp 0x%llx distance 0x%llx, gfrc 0x%llx\n", + res, + s->g_timer.reg.comp[res], + distance_min, + gfrc); + + return res; +} + +/* + * Get distance to nearest Comparator + */ +static uint64_t exynos4210_gcomp_get_distance(Exynos4210MCTState *s, int32_t id) +{ + if (id == -1) { + /* no enabled Comparators, choose max distance */ + return MCT_GT_COUNTER_STEP; + } + if (s->g_timer.reg.comp[id] - s->g_timer.reg.cnt < MCT_GT_COUNTER_STEP) { + return s->g_timer.reg.comp[id] - s->g_timer.reg.cnt; + } else { + return MCT_GT_COUNTER_STEP; + } +} + +/* + * Restart global FRC timer + * Must be called within exynos4210_gfrc_tx_begin/commit block. + */ +static void exynos4210_gfrc_restart(Exynos4210MCTState *s) +{ + uint64_t distance; + + exynos4210_gfrc_stop(&s->g_timer); + + s->g_timer.curr_comp = exynos4210_gcomp_find(s); + + distance = exynos4210_gcomp_get_distance(s, s->g_timer.curr_comp); + + if (distance > MCT_GT_COUNTER_STEP || !distance) { + distance = MCT_GT_COUNTER_STEP; + } + + exynos4210_gfrc_set_count(&s->g_timer, distance); + exynos4210_gfrc_start(&s->g_timer); +} + +/* + * Raise global timer CMP IRQ + */ +static void exynos4210_gcomp_raise_irq(void *opaque, uint32_t id) +{ + Exynos4210MCTGT *s = opaque; + + /* If CSTAT is pending and IRQ is enabled */ + if ((s->reg.int_cstat & G_INT_CSTAT_COMP(id)) && + (s->reg.int_enb & G_INT_ENABLE(id))) { + DPRINTF("gcmp timer[%u] IRQ\n", id); + qemu_irq_raise(s->irq[id]); + } +} + +/* + * Lower global timer CMP IRQ + */ +static void exynos4210_gcomp_lower_irq(void *opaque, uint32_t id) +{ + Exynos4210MCTGT *s = opaque; + qemu_irq_lower(s->irq[id]); +} + +/* + * Global timer FRC event handler. + * Each event occurs when internal counter reaches counter + MCT_GT_COUNTER_STEP + * Every time we arm global FRC timer to count for MCT_GT_COUNTER_STEP value + */ +static void exynos4210_gfrc_event(void *opaque) +{ + Exynos4210MCTState *s = (Exynos4210MCTState *)opaque; + int i; + uint64_t distance; + + DPRINTF("\n"); + + s->g_timer.reg.cnt += s->g_timer.count; + + /* Process all comparators */ + for (i = 0; i < MCT_GT_CMP_NUM; i++) { + + if (s->g_timer.reg.cnt == s->g_timer.reg.comp[i]) { + /* reached nearest comparator */ + + s->g_timer.reg.int_cstat |= G_INT_CSTAT_COMP(i); + + /* Auto increment */ + if (s->g_timer.reg.tcon & G_TCON_AUTO_ICREMENT(i)) { + s->g_timer.reg.comp[i] += s->g_timer.reg.comp_add_incr[i]; + } + + /* IRQ */ + exynos4210_gcomp_raise_irq(&s->g_timer, i); + } + } + + /* Reload FRC to reach nearest comparator */ + s->g_timer.curr_comp = exynos4210_gcomp_find(s); + distance = exynos4210_gcomp_get_distance(s, s->g_timer.curr_comp); + if (distance > MCT_GT_COUNTER_STEP || !distance) { + distance = MCT_GT_COUNTER_STEP; + } + exynos4210_gfrc_set_count(&s->g_timer, distance); + + exynos4210_gfrc_start(&s->g_timer); +} + +/* + * Get counter of FRC local timer. + */ +static uint64_t exynos4210_lfrc_get_count(Exynos4210MCTLT *s) +{ + return ptimer_get_count(s->ptimer_frc); +} + +/* + * Set counter of FRC local timer. + * Must be called from within exynos4210_lfrc_tx_begin/commit block. + */ +static void exynos4210_lfrc_update_count(Exynos4210MCTLT *s) +{ + if (!s->reg.cnt[L_REG_CNT_FRCCNTB]) { + ptimer_set_count(s->ptimer_frc, MCT_LT_COUNTER_STEP); + } else { + ptimer_set_count(s->ptimer_frc, s->reg.cnt[L_REG_CNT_FRCCNTB]); + } +} + +/* + * Start local FRC timer + * Must be called from within exynos4210_lfrc_tx_begin/commit block. + */ +static void exynos4210_lfrc_start(Exynos4210MCTLT *s) +{ + ptimer_run(s->ptimer_frc, 1); +} + +/* + * Stop local FRC timer + * Must be called from within exynos4210_lfrc_tx_begin/commit block. + */ +static void exynos4210_lfrc_stop(Exynos4210MCTLT *s) +{ + ptimer_stop(s->ptimer_frc); +} + +/* Start ptimer transaction for local FRC timer */ +static void exynos4210_lfrc_tx_begin(Exynos4210MCTLT *s) +{ + ptimer_transaction_begin(s->ptimer_frc); +} + +/* Commit ptimer transaction for local FRC timer */ +static void exynos4210_lfrc_tx_commit(Exynos4210MCTLT *s) +{ + ptimer_transaction_commit(s->ptimer_frc); +} + +/* + * Local timer free running counter tick handler + */ +static void exynos4210_lfrc_event(void *opaque) +{ + Exynos4210MCTLT * s = (Exynos4210MCTLT *)opaque; + + /* local frc expired */ + + DPRINTF("\n"); + + s->reg.int_cstat |= L_INT_CSTAT_FRCCNT; + + /* update frc counter */ + exynos4210_lfrc_update_count(s); + + /* raise irq */ + if (s->reg.int_enb & L_INT_INTENB_FRCEIE) { + qemu_irq_raise(s->irq); + } + + /* we reached here, this means that timer is enabled */ + exynos4210_lfrc_start(s); +} + +static uint32_t exynos4210_ltick_int_get_cnto(struct tick_timer *s); +static uint32_t exynos4210_ltick_cnt_get_cnto(struct tick_timer *s); +static void exynos4210_ltick_recalc_count(struct tick_timer *s); + +/* + * Action on enabling local tick int timer + */ +static void exynos4210_ltick_int_start(struct tick_timer *s) +{ + if (!s->int_run) { + s->int_run = 1; + } +} + +/* + * Action on disabling local tick int timer + */ +static void exynos4210_ltick_int_stop(struct tick_timer *s) +{ + if (s->int_run) { + s->last_icnto = exynos4210_ltick_int_get_cnto(s); + s->int_run = 0; + } +} + +/* + * Get count for INT timer + */ +static uint32_t exynos4210_ltick_int_get_cnto(struct tick_timer *s) +{ + uint32_t icnto; + uint64_t remain; + uint64_t count; + uint64_t counted; + uint64_t cur_progress; + + count = ptimer_get_count(s->ptimer_tick); + if (count) { + /* timer is still counting, called not from event */ + counted = s->count - ptimer_get_count(s->ptimer_tick); + cur_progress = s->progress + counted; + } else { + /* timer expired earlier */ + cur_progress = s->progress; + } + + remain = s->distance - cur_progress; + + if (!s->int_run) { + /* INT is stopped. */ + icnto = s->last_icnto; + } else { + /* Both are counting */ + icnto = remain / s->tcntb; + } + + return icnto; +} + +/* + * Start local tick cnt timer. + * Must be called within exynos4210_ltick_tx_begin/commit block. + */ +static void exynos4210_ltick_cnt_start(struct tick_timer *s) +{ + if (!s->cnt_run) { + + exynos4210_ltick_recalc_count(s); + ptimer_set_count(s->ptimer_tick, s->count); + ptimer_run(s->ptimer_tick, 1); + + s->cnt_run = 1; + } +} + +/* + * Stop local tick cnt timer. + * Must be called within exynos4210_ltick_tx_begin/commit block. + */ +static void exynos4210_ltick_cnt_stop(struct tick_timer *s) +{ + if (s->cnt_run) { + + s->last_tcnto = exynos4210_ltick_cnt_get_cnto(s); + + if (s->int_run) { + exynos4210_ltick_int_stop(s); + } + + ptimer_stop(s->ptimer_tick); + + s->cnt_run = 0; + } +} + +/* Start ptimer transaction for local tick timer */ +static void exynos4210_ltick_tx_begin(struct tick_timer *s) +{ + ptimer_transaction_begin(s->ptimer_tick); +} + +/* Commit ptimer transaction for local tick timer */ +static void exynos4210_ltick_tx_commit(struct tick_timer *s) +{ + ptimer_transaction_commit(s->ptimer_tick); +} + +/* + * Get counter for CNT timer + */ +static uint32_t exynos4210_ltick_cnt_get_cnto(struct tick_timer *s) +{ + uint32_t tcnto; + uint32_t icnto; + uint64_t remain; + uint64_t counted; + uint64_t count; + uint64_t cur_progress; + + count = ptimer_get_count(s->ptimer_tick); + if (count) { + /* timer is still counting, called not from event */ + counted = s->count - ptimer_get_count(s->ptimer_tick); + cur_progress = s->progress + counted; + } else { + /* timer expired earlier */ + cur_progress = s->progress; + } + + remain = s->distance - cur_progress; + + if (!s->cnt_run) { + /* Both are stopped. */ + tcnto = s->last_tcnto; + } else if (!s->int_run) { + /* INT counter is stopped, progress is by CNT timer */ + tcnto = remain % s->tcntb; + } else { + /* Both are counting */ + icnto = remain / s->tcntb; + if (icnto) { + tcnto = remain % (icnto * s->tcntb); + } else { + tcnto = remain % s->tcntb; + } + } + + return tcnto; +} + +/* + * Set new values of counters for CNT and INT timers + * Must be called within exynos4210_ltick_tx_begin/commit block. + */ +static void exynos4210_ltick_set_cntb(struct tick_timer *s, uint32_t new_cnt, + uint32_t new_int) +{ + uint32_t cnt_stopped = 0; + uint32_t int_stopped = 0; + + if (s->cnt_run) { + exynos4210_ltick_cnt_stop(s); + cnt_stopped = 1; + } + + if (s->int_run) { + exynos4210_ltick_int_stop(s); + int_stopped = 1; + } + + s->tcntb = new_cnt + 1; + s->icntb = new_int + 1; + + if (cnt_stopped) { + exynos4210_ltick_cnt_start(s); + } + if (int_stopped) { + exynos4210_ltick_int_start(s); + } + +} + +/* + * Calculate new counter value for tick timer + */ +static void exynos4210_ltick_recalc_count(struct tick_timer *s) +{ + uint64_t to_count; + + if ((s->cnt_run && s->last_tcnto) || (s->int_run && s->last_icnto)) { + /* + * one or both timers run and not counted to the end; + * distance is not passed, recalculate with last_tcnto * last_icnto + */ + + if (s->last_tcnto) { + to_count = (uint64_t)s->last_tcnto * s->last_icnto; + } else { + to_count = s->last_icnto; + } + } else { + /* distance is passed, recalculate with tcnto * icnto */ + if (s->icntb) { + s->distance = (uint64_t)s->tcntb * s->icntb; + } else { + s->distance = s->tcntb; + } + + to_count = s->distance; + s->progress = 0; + } + + if (to_count > MCT_LT_COUNTER_STEP) { + /* count by step */ + s->count = MCT_LT_COUNTER_STEP; + } else { + s->count = to_count; + } +} + +/* + * Initialize tick_timer + */ +static void exynos4210_ltick_timer_init(struct tick_timer *s) +{ + exynos4210_ltick_int_stop(s); + exynos4210_ltick_tx_begin(s); + exynos4210_ltick_cnt_stop(s); + exynos4210_ltick_tx_commit(s); + + s->count = 0; + s->distance = 0; + s->progress = 0; + s->icntb = 0; + s->tcntb = 0; +} + +/* + * tick_timer event. + * Raises when abstract tick_timer expires. + */ +static void exynos4210_ltick_timer_event(struct tick_timer *s) +{ + s->progress += s->count; +} + +/* + * Local timer tick counter handler. + * Don't use reloaded timers. If timer counter = zero + * then handler called but after handler finished no + * timer reload occurs. + */ +static void exynos4210_ltick_event(void *opaque) +{ + Exynos4210MCTLT * s = (Exynos4210MCTLT *)opaque; + uint32_t tcnto; + uint32_t icnto; +#ifdef DEBUG_MCT + static uint64_t time1[2] = {0}; + static uint64_t time2[2] = {0}; +#endif + + /* Call tick_timer event handler, it will update its tcntb and icntb. */ + exynos4210_ltick_timer_event(&s->tick_timer); + + /* get tick_timer cnt */ + tcnto = exynos4210_ltick_cnt_get_cnto(&s->tick_timer); + + /* get tick_timer int */ + icnto = exynos4210_ltick_int_get_cnto(&s->tick_timer); + + /* raise IRQ if needed */ + if (!icnto && s->reg.tcon & L_TCON_INT_START) { + /* INT counter enabled and expired */ + + s->reg.int_cstat |= L_INT_CSTAT_INTCNT; + + /* raise interrupt if enabled */ + if (s->reg.int_enb & L_INT_INTENB_ICNTEIE) { +#ifdef DEBUG_MCT + time2[s->id] = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + DPRINTF("local timer[%d] IRQ: %llx\n", s->id, + time2[s->id] - time1[s->id]); + time1[s->id] = time2[s->id]; +#endif + qemu_irq_raise(s->irq); + } + + /* reload ICNTB */ + if (s->reg.tcon & L_TCON_INTERVAL_MODE) { + exynos4210_ltick_set_cntb(&s->tick_timer, + s->reg.cnt[L_REG_CNT_TCNTB], + s->reg.cnt[L_REG_CNT_ICNTB]); + } + } else { + /* reload TCNTB */ + if (!tcnto) { + exynos4210_ltick_set_cntb(&s->tick_timer, + s->reg.cnt[L_REG_CNT_TCNTB], + icnto); + } + } + + /* start tick_timer cnt */ + exynos4210_ltick_cnt_start(&s->tick_timer); + + /* start tick_timer int */ + exynos4210_ltick_int_start(&s->tick_timer); +} + +static void tx_ptimer_set_freq(ptimer_state *s, uint32_t freq) +{ + /* + * callers of exynos4210_mct_update_freq() never do anything + * else that needs to be in the same ptimer transaction, so + * to avoid a lot of repetition we have a convenience function + * for begin/set_freq/commit. + */ + ptimer_transaction_begin(s); + ptimer_set_freq(s, freq); + ptimer_transaction_commit(s); +} + +/* update timer frequency */ +static void exynos4210_mct_update_freq(Exynos4210MCTState *s) +{ + uint32_t freq = s->freq; + s->freq = 24000000 / + ((MCT_CFG_GET_PRESCALER(s->reg_mct_cfg) + 1) * + MCT_CFG_GET_DIVIDER(s->reg_mct_cfg)); + + if (freq != s->freq) { + DPRINTF("freq=%uHz\n", s->freq); + + /* global timer */ + tx_ptimer_set_freq(s->g_timer.ptimer_frc, s->freq); + + /* local timer */ + tx_ptimer_set_freq(s->l_timer[0].tick_timer.ptimer_tick, s->freq); + tx_ptimer_set_freq(s->l_timer[0].ptimer_frc, s->freq); + tx_ptimer_set_freq(s->l_timer[1].tick_timer.ptimer_tick, s->freq); + tx_ptimer_set_freq(s->l_timer[1].ptimer_frc, s->freq); + } +} + +/* set defaul_timer values for all fields */ +static void exynos4210_mct_reset(DeviceState *d) +{ + Exynos4210MCTState *s = EXYNOS4210_MCT(d); + uint32_t i; + + s->reg_mct_cfg = 0; + + /* global timer */ + memset(&s->g_timer.reg, 0, sizeof(s->g_timer.reg)); + exynos4210_gfrc_tx_begin(&s->g_timer); + exynos4210_gfrc_stop(&s->g_timer); + exynos4210_gfrc_tx_commit(&s->g_timer); + + /* local timer */ + memset(s->l_timer[0].reg.cnt, 0, sizeof(s->l_timer[0].reg.cnt)); + memset(s->l_timer[1].reg.cnt, 0, sizeof(s->l_timer[1].reg.cnt)); + for (i = 0; i < 2; i++) { + s->l_timer[i].reg.int_cstat = 0; + s->l_timer[i].reg.int_enb = 0; + s->l_timer[i].reg.tcon = 0; + s->l_timer[i].reg.wstat = 0; + s->l_timer[i].tick_timer.count = 0; + s->l_timer[i].tick_timer.distance = 0; + s->l_timer[i].tick_timer.progress = 0; + exynos4210_lfrc_tx_begin(&s->l_timer[i]); + ptimer_stop(s->l_timer[i].ptimer_frc); + exynos4210_lfrc_tx_commit(&s->l_timer[i]); + + exynos4210_ltick_timer_init(&s->l_timer[i].tick_timer); + } + + exynos4210_mct_update_freq(s); + +} + +/* Multi Core Timer read */ +static uint64_t exynos4210_mct_read(void *opaque, hwaddr offset, + unsigned size) +{ + Exynos4210MCTState *s = (Exynos4210MCTState *)opaque; + int index; + int shift; + uint64_t count; + uint32_t value = 0; + int lt_i; + + switch (offset) { + + case MCT_CFG: + value = s->reg_mct_cfg; + break; + + case G_CNT_L: case G_CNT_U: + shift = 8 * (offset & 0x4); + count = exynos4210_gfrc_get_count(&s->g_timer); + value = UINT32_MAX & (count >> shift); + DPRINTF("read FRC=0x%llx\n", count); + break; + + case G_CNT_WSTAT: + value = s->g_timer.reg.cnt_wstat; + break; + + case G_COMP_L(0): case G_COMP_L(1): case G_COMP_L(2): case G_COMP_L(3): + case G_COMP_U(0): case G_COMP_U(1): case G_COMP_U(2): case G_COMP_U(3): + index = GET_G_COMP_IDX(offset); + shift = 8 * (offset & 0x4); + value = UINT32_MAX & (s->g_timer.reg.comp[index] >> shift); + break; + + case G_TCON: + value = s->g_timer.reg.tcon; + break; + + case G_INT_CSTAT: + value = s->g_timer.reg.int_cstat; + break; + + case G_INT_ENB: + value = s->g_timer.reg.int_enb; + break; + case G_WSTAT: + value = s->g_timer.reg.wstat; + break; + + case G_COMP0_ADD_INCR: case G_COMP1_ADD_INCR: + case G_COMP2_ADD_INCR: case G_COMP3_ADD_INCR: + value = s->g_timer.reg.comp_add_incr[GET_G_COMP_ADD_INCR_IDX(offset)]; + break; + + /* Local timers */ + case L0_TCNTB: case L0_ICNTB: case L0_FRCNTB: + case L1_TCNTB: case L1_ICNTB: case L1_FRCNTB: + lt_i = GET_L_TIMER_IDX(offset); + index = GET_L_TIMER_CNT_REG_IDX(offset, lt_i); + value = s->l_timer[lt_i].reg.cnt[index]; + break; + + case L0_TCNTO: case L1_TCNTO: + lt_i = GET_L_TIMER_IDX(offset); + + value = exynos4210_ltick_cnt_get_cnto(&s->l_timer[lt_i].tick_timer); + DPRINTF("local timer[%d] read TCNTO %x\n", lt_i, value); + break; + + case L0_ICNTO: case L1_ICNTO: + lt_i = GET_L_TIMER_IDX(offset); + + value = exynos4210_ltick_int_get_cnto(&s->l_timer[lt_i].tick_timer); + DPRINTF("local timer[%d] read ICNTO %x\n", lt_i, value); + break; + + case L0_FRCNTO: case L1_FRCNTO: + lt_i = GET_L_TIMER_IDX(offset); + + value = exynos4210_lfrc_get_count(&s->l_timer[lt_i]); + break; + + case L0_TCON: case L1_TCON: + lt_i = ((offset & 0xF00) - L0_TCNTB) / 0x100; + value = s->l_timer[lt_i].reg.tcon; + break; + + case L0_INT_CSTAT: case L1_INT_CSTAT: + lt_i = ((offset & 0xF00) - L0_TCNTB) / 0x100; + value = s->l_timer[lt_i].reg.int_cstat; + break; + + case L0_INT_ENB: case L1_INT_ENB: + lt_i = ((offset & 0xF00) - L0_TCNTB) / 0x100; + value = s->l_timer[lt_i].reg.int_enb; + break; + + case L0_WSTAT: case L1_WSTAT: + lt_i = ((offset & 0xF00) - L0_TCNTB) / 0x100; + value = s->l_timer[lt_i].reg.wstat; + break; + + default: + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIX "\n", + __func__, offset); + break; + } + return value; +} + +/* MCT write */ +static void exynos4210_mct_write(void *opaque, hwaddr offset, + uint64_t value, unsigned size) +{ + Exynos4210MCTState *s = (Exynos4210MCTState *)opaque; + int index; /* index in buffer which represents register set */ + int shift; + int lt_i; + uint64_t new_frc; + uint32_t i; + uint32_t old_val; +#ifdef DEBUG_MCT + static uint32_t icntb_max[2] = {0}; + static uint32_t icntb_min[2] = {UINT32_MAX, UINT32_MAX}; + static uint32_t tcntb_max[2] = {0}; + static uint32_t tcntb_min[2] = {UINT32_MAX, UINT32_MAX}; +#endif + + new_frc = s->g_timer.reg.cnt; + + switch (offset) { + + case MCT_CFG: + s->reg_mct_cfg = value; + exynos4210_mct_update_freq(s); + break; + + case G_CNT_L: + case G_CNT_U: + if (offset == G_CNT_L) { + + DPRINTF("global timer write to reg.cntl %llx\n", value); + + new_frc = (s->g_timer.reg.cnt & (uint64_t)UINT32_MAX << 32) + value; + s->g_timer.reg.cnt_wstat |= G_CNT_WSTAT_L; + } + if (offset == G_CNT_U) { + + DPRINTF("global timer write to reg.cntu %llx\n", value); + + new_frc = (s->g_timer.reg.cnt & UINT32_MAX) + + ((uint64_t)value << 32); + s->g_timer.reg.cnt_wstat |= G_CNT_WSTAT_U; + } + + s->g_timer.reg.cnt = new_frc; + exynos4210_gfrc_tx_begin(&s->g_timer); + exynos4210_gfrc_restart(s); + exynos4210_gfrc_tx_commit(&s->g_timer); + break; + + case G_CNT_WSTAT: + s->g_timer.reg.cnt_wstat &= ~(value); + break; + + case G_COMP_L(0): case G_COMP_L(1): case G_COMP_L(2): case G_COMP_L(3): + case G_COMP_U(0): case G_COMP_U(1): case G_COMP_U(2): case G_COMP_U(3): + index = GET_G_COMP_IDX(offset); + shift = 8 * (offset & 0x4); + s->g_timer.reg.comp[index] = + (s->g_timer.reg.comp[index] & + (((uint64_t)UINT32_MAX << 32) >> shift)) + + (value << shift); + + DPRINTF("comparator %d write 0x%llx val << %d\n", index, value, shift); + + if (offset & 0x4) { + s->g_timer.reg.wstat |= G_WSTAT_COMP_U(index); + } else { + s->g_timer.reg.wstat |= G_WSTAT_COMP_L(index); + } + + exynos4210_gfrc_tx_begin(&s->g_timer); + exynos4210_gfrc_restart(s); + exynos4210_gfrc_tx_commit(&s->g_timer); + break; + + case G_TCON: + old_val = s->g_timer.reg.tcon; + s->g_timer.reg.tcon = value; + s->g_timer.reg.wstat |= G_WSTAT_TCON_WRITE; + + DPRINTF("global timer write to reg.g_tcon %llx\n", value); + + exynos4210_gfrc_tx_begin(&s->g_timer); + + /* Start FRC if transition from disabled to enabled */ + if ((value & G_TCON_TIMER_ENABLE) > (old_val & + G_TCON_TIMER_ENABLE)) { + exynos4210_gfrc_restart(s); + } + if ((value & G_TCON_TIMER_ENABLE) < (old_val & + G_TCON_TIMER_ENABLE)) { + exynos4210_gfrc_stop(&s->g_timer); + } + + /* Start CMP if transition from disabled to enabled */ + for (i = 0; i < MCT_GT_CMP_NUM; i++) { + if ((value & G_TCON_COMP_ENABLE(i)) != (old_val & + G_TCON_COMP_ENABLE(i))) { + exynos4210_gfrc_restart(s); + } + } + + exynos4210_gfrc_tx_commit(&s->g_timer); + break; + + case G_INT_CSTAT: + s->g_timer.reg.int_cstat &= ~(value); + for (i = 0; i < MCT_GT_CMP_NUM; i++) { + if (value & G_INT_CSTAT_COMP(i)) { + exynos4210_gcomp_lower_irq(&s->g_timer, i); + } + } + break; + + case G_INT_ENB: + /* Raise IRQ if transition from disabled to enabled and CSTAT pending */ + for (i = 0; i < MCT_GT_CMP_NUM; i++) { + if ((value & G_INT_ENABLE(i)) > (s->g_timer.reg.tcon & + G_INT_ENABLE(i))) { + if (s->g_timer.reg.int_cstat & G_INT_CSTAT_COMP(i)) { + exynos4210_gcomp_raise_irq(&s->g_timer, i); + } + } + + if ((value & G_INT_ENABLE(i)) < (s->g_timer.reg.tcon & + G_INT_ENABLE(i))) { + exynos4210_gcomp_lower_irq(&s->g_timer, i); + } + } + + DPRINTF("global timer INT enable %llx\n", value); + s->g_timer.reg.int_enb = value; + break; + + case G_WSTAT: + s->g_timer.reg.wstat &= ~(value); + break; + + case G_COMP0_ADD_INCR: case G_COMP1_ADD_INCR: + case G_COMP2_ADD_INCR: case G_COMP3_ADD_INCR: + index = GET_G_COMP_ADD_INCR_IDX(offset); + s->g_timer.reg.comp_add_incr[index] = value; + s->g_timer.reg.wstat |= G_WSTAT_COMP_ADDINCR(index); + break; + + /* Local timers */ + case L0_TCON: case L1_TCON: + lt_i = GET_L_TIMER_IDX(offset); + old_val = s->l_timer[lt_i].reg.tcon; + + s->l_timer[lt_i].reg.wstat |= L_WSTAT_TCON_WRITE; + s->l_timer[lt_i].reg.tcon = value; + + exynos4210_ltick_tx_begin(&s->l_timer[lt_i].tick_timer); + /* Stop local CNT */ + if ((value & L_TCON_TICK_START) < + (old_val & L_TCON_TICK_START)) { + DPRINTF("local timer[%d] stop cnt\n", lt_i); + exynos4210_ltick_cnt_stop(&s->l_timer[lt_i].tick_timer); + } + + /* Stop local INT */ + if ((value & L_TCON_INT_START) < + (old_val & L_TCON_INT_START)) { + DPRINTF("local timer[%d] stop int\n", lt_i); + exynos4210_ltick_int_stop(&s->l_timer[lt_i].tick_timer); + } + + /* Start local CNT */ + if ((value & L_TCON_TICK_START) > + (old_val & L_TCON_TICK_START)) { + DPRINTF("local timer[%d] start cnt\n", lt_i); + exynos4210_ltick_cnt_start(&s->l_timer[lt_i].tick_timer); + } + + /* Start local INT */ + if ((value & L_TCON_INT_START) > + (old_val & L_TCON_INT_START)) { + DPRINTF("local timer[%d] start int\n", lt_i); + exynos4210_ltick_int_start(&s->l_timer[lt_i].tick_timer); + } + exynos4210_ltick_tx_commit(&s->l_timer[lt_i].tick_timer); + + /* Start or Stop local FRC if TCON changed */ + exynos4210_lfrc_tx_begin(&s->l_timer[lt_i]); + if ((value & L_TCON_FRC_START) > + (s->l_timer[lt_i].reg.tcon & L_TCON_FRC_START)) { + DPRINTF("local timer[%d] start frc\n", lt_i); + exynos4210_lfrc_start(&s->l_timer[lt_i]); + } + if ((value & L_TCON_FRC_START) < + (s->l_timer[lt_i].reg.tcon & L_TCON_FRC_START)) { + DPRINTF("local timer[%d] stop frc\n", lt_i); + exynos4210_lfrc_stop(&s->l_timer[lt_i]); + } + exynos4210_lfrc_tx_commit(&s->l_timer[lt_i]); + break; + + case L0_TCNTB: case L1_TCNTB: + lt_i = GET_L_TIMER_IDX(offset); + + /* + * TCNTB is updated to internal register only after CNT expired. + * Due to this we should reload timer to nearest moment when CNT is + * expired and then in event handler update tcntb to new TCNTB value. + */ + exynos4210_ltick_tx_begin(&s->l_timer[lt_i].tick_timer); + exynos4210_ltick_set_cntb(&s->l_timer[lt_i].tick_timer, value, + s->l_timer[lt_i].tick_timer.icntb); + exynos4210_ltick_tx_commit(&s->l_timer[lt_i].tick_timer); + + s->l_timer[lt_i].reg.wstat |= L_WSTAT_TCNTB_WRITE; + s->l_timer[lt_i].reg.cnt[L_REG_CNT_TCNTB] = value; + +#ifdef DEBUG_MCT + if (tcntb_min[lt_i] > value) { + tcntb_min[lt_i] = value; + } + if (tcntb_max[lt_i] < value) { + tcntb_max[lt_i] = value; + } + DPRINTF("local timer[%d] TCNTB write %llx; max=%x, min=%x\n", + lt_i, value, tcntb_max[lt_i], tcntb_min[lt_i]); +#endif + break; + + case L0_ICNTB: case L1_ICNTB: + lt_i = GET_L_TIMER_IDX(offset); + + s->l_timer[lt_i].reg.wstat |= L_WSTAT_ICNTB_WRITE; + s->l_timer[lt_i].reg.cnt[L_REG_CNT_ICNTB] = value & + ~L_ICNTB_MANUAL_UPDATE; + + /* + * We need to avoid too small values for TCNTB*ICNTB. If not, IRQ event + * could raise too fast disallowing QEMU to execute target code. + */ + if (s->l_timer[lt_i].reg.cnt[L_REG_CNT_ICNTB] * + s->l_timer[lt_i].reg.cnt[L_REG_CNT_TCNTB] < MCT_LT_CNT_LOW_LIMIT) { + if (!s->l_timer[lt_i].reg.cnt[L_REG_CNT_TCNTB]) { + s->l_timer[lt_i].reg.cnt[L_REG_CNT_ICNTB] = + MCT_LT_CNT_LOW_LIMIT; + } else { + s->l_timer[lt_i].reg.cnt[L_REG_CNT_ICNTB] = + MCT_LT_CNT_LOW_LIMIT / + s->l_timer[lt_i].reg.cnt[L_REG_CNT_TCNTB]; + } + } + + if (value & L_ICNTB_MANUAL_UPDATE) { + exynos4210_ltick_set_cntb(&s->l_timer[lt_i].tick_timer, + s->l_timer[lt_i].tick_timer.tcntb, + s->l_timer[lt_i].reg.cnt[L_REG_CNT_ICNTB]); + } + +#ifdef DEBUG_MCT + if (icntb_min[lt_i] > value) { + icntb_min[lt_i] = value; + } + if (icntb_max[lt_i] < value) { + icntb_max[lt_i] = value; + } + DPRINTF("local timer[%d] ICNTB write %llx; max=%x, min=%x\n\n", + lt_i, value, icntb_max[lt_i], icntb_min[lt_i]); +#endif + break; + + case L0_FRCNTB: case L1_FRCNTB: + lt_i = GET_L_TIMER_IDX(offset); + DPRINTF("local timer[%d] FRCNTB write %llx\n", lt_i, value); + + s->l_timer[lt_i].reg.wstat |= L_WSTAT_FRCCNTB_WRITE; + s->l_timer[lt_i].reg.cnt[L_REG_CNT_FRCCNTB] = value; + + break; + + case L0_TCNTO: case L1_TCNTO: + case L0_ICNTO: case L1_ICNTO: + case L0_FRCNTO: case L1_FRCNTO: + qemu_log_mask(LOG_GUEST_ERROR, + "exynos4210.mct: write to RO register " TARGET_FMT_plx, + offset); + break; + + case L0_INT_CSTAT: case L1_INT_CSTAT: + lt_i = GET_L_TIMER_IDX(offset); + + DPRINTF("local timer[%d] CSTAT write %llx\n", lt_i, value); + + s->l_timer[lt_i].reg.int_cstat &= ~value; + if (!s->l_timer[lt_i].reg.int_cstat) { + qemu_irq_lower(s->l_timer[lt_i].irq); + } + break; + + case L0_INT_ENB: case L1_INT_ENB: + lt_i = GET_L_TIMER_IDX(offset); + old_val = s->l_timer[lt_i].reg.int_enb; + + /* Raise Local timer IRQ if cstat is pending */ + if ((value & L_INT_INTENB_ICNTEIE) > (old_val & L_INT_INTENB_ICNTEIE)) { + if (s->l_timer[lt_i].reg.int_cstat & L_INT_CSTAT_INTCNT) { + qemu_irq_raise(s->l_timer[lt_i].irq); + } + } + + s->l_timer[lt_i].reg.int_enb = value; + + break; + + case L0_WSTAT: case L1_WSTAT: + lt_i = GET_L_TIMER_IDX(offset); + + s->l_timer[lt_i].reg.wstat &= ~value; + break; + + default: + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIX "\n", + __func__, offset); + break; + } +} + +static const MemoryRegionOps exynos4210_mct_ops = { + .read = exynos4210_mct_read, + .write = exynos4210_mct_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +/* MCT init */ +static void exynos4210_mct_init(Object *obj) +{ + int i; + Exynos4210MCTState *s = EXYNOS4210_MCT(obj); + SysBusDevice *dev = SYS_BUS_DEVICE(obj); + + /* Global timer */ + s->g_timer.ptimer_frc = ptimer_init(exynos4210_gfrc_event, s, + PTIMER_POLICY_DEFAULT); + memset(&s->g_timer.reg, 0, sizeof(struct gregs)); + + /* Local timers */ + for (i = 0; i < 2; i++) { + s->l_timer[i].tick_timer.ptimer_tick = + ptimer_init(exynos4210_ltick_event, &s->l_timer[i], + PTIMER_POLICY_DEFAULT); + s->l_timer[i].ptimer_frc = + ptimer_init(exynos4210_lfrc_event, &s->l_timer[i], + PTIMER_POLICY_DEFAULT); + s->l_timer[i].id = i; + } + + /* IRQs */ + for (i = 0; i < MCT_GT_CMP_NUM; i++) { + sysbus_init_irq(dev, &s->g_timer.irq[i]); + } + for (i = 0; i < 2; i++) { + sysbus_init_irq(dev, &s->l_timer[i].irq); + } + + memory_region_init_io(&s->iomem, obj, &exynos4210_mct_ops, s, + "exynos4210-mct", MCT_SFR_SIZE); + sysbus_init_mmio(dev, &s->iomem); +} + +static void exynos4210_mct_finalize(Object *obj) +{ + int i; + Exynos4210MCTState *s = EXYNOS4210_MCT(obj); + + ptimer_free(s->g_timer.ptimer_frc); + + for (i = 0; i < 2; i++) { + ptimer_free(s->l_timer[i].tick_timer.ptimer_tick); + ptimer_free(s->l_timer[i].ptimer_frc); + } +} + +static void exynos4210_mct_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->reset = exynos4210_mct_reset; + dc->vmsd = &vmstate_exynos4210_mct_state; +} + +static const TypeInfo exynos4210_mct_info = { + .name = TYPE_EXYNOS4210_MCT, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(Exynos4210MCTState), + .instance_init = exynos4210_mct_init, + .instance_finalize = exynos4210_mct_finalize, + .class_init = exynos4210_mct_class_init, +}; + +static void exynos4210_mct_register_types(void) +{ + type_register_static(&exynos4210_mct_info); +} + +type_init(exynos4210_mct_register_types) |