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[109.242.226.170]) by smtp.gmail.com with ESMTPSA id m8-20020adfa3c8000000b0032d7fde2d3csm7990663wrb.79.2023.10.13.00.51.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Oct 2023 00:51:18 -0700 (PDT) From: Emmanouil Pitsidianakis To: qemu-devel@nongnu.org, qemu-arm@nongnu.org, qemu-block@nongnu.org Cc: Emmanouil Pitsidianakis , Peter Maydell , =?utf-8?q?C=C3=A9dric_Le_Goater?= , Andrew Jeffery , Joel Stanley , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Mark Cave-Ayland , qemu-ppc@nongnu.org (open list:New World (mac99)) Subject: [RFC PATCH 42/75] hw/misc: add fallthrough pseudo-keyword Date: Fri, 13 Oct 2023 10:47:52 +0300 Message-Id: <425f0e72cbc10f9acc0c92b6404f7d006e69f05f.1697034504.git.manos.pitsidianakis@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::336; envelope-from=manos.pitsidianakis@linaro.org; helo=mail-wm1-x336.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Fri, 13 Oct 2023 08:49:59 -0400 X-BeenThere: qemu-ppc@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-ppc-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-ppc-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Emmanouil Pitsidianakis --- hw/misc/a9scu.c | 2 ++ hw/misc/aspeed_scu.c | 2 +- hw/misc/bcm2835_property.c | 12 ++++++------ hw/misc/mos6522.c | 4 ++-- 4 files changed, 11 insertions(+), 9 deletions(-) diff --git a/hw/misc/a9scu.c b/hw/misc/a9scu.c index a375ebc987..b422bec3c4 100644 --- a/hw/misc/a9scu.c +++ b/hw/misc/a9scu.c @@ -21,26 +21,27 @@ static uint64_t a9_scu_read(void *opaque, hwaddr offset, unsigned size) { A9SCUState *s = (A9SCUState *)opaque; switch (offset) { case 0x00: /* Control */ return s->control; case 0x04: /* Configuration */ return (((1 << s->num_cpu) - 1) << 4) | (s->num_cpu - 1); case 0x08: /* CPU Power Status */ return s->status; case 0x0c: /* Invalidate All Registers In Secure State */ return 0; case 0x40: /* Filtering Start Address Register */ case 0x44: /* Filtering End Address Register */ /* RAZ/WI, like an implementation with only one AXI master */ return 0; case 0x50: /* SCU Access Control Register */ case 0x54: /* SCU Non-secure Access Control Register */ /* unimplemented, fall through */ + fallthrough; default: qemu_log_mask(LOG_UNIMP, "%s: Unsupported offset 0x%"HWADDR_PRIx"\n", __func__, offset); return 0; } } @@ -48,31 +49,32 @@ static uint64_t a9_scu_read(void *opaque, hwaddr offset, static void a9_scu_write(void *opaque, hwaddr offset, uint64_t value, unsigned size) { A9SCUState *s = (A9SCUState *)opaque; switch (offset) { case 0x00: /* Control */ s->control = value & 1; break; case 0x4: /* Configuration: RO */ break; case 0x08: case 0x09: case 0x0A: case 0x0B: /* Power Control */ s->status = value; break; case 0x0c: /* Invalidate All Registers In Secure State */ /* no-op as we do not implement caches */ break; case 0x40: /* Filtering Start Address Register */ case 0x44: /* Filtering End Address Register */ /* RAZ/WI, like an implementation with only one AXI master */ break; case 0x50: /* SCU Access Control Register */ case 0x54: /* SCU Non-secure Access Control Register */ /* unimplemented, fall through */ + fallthrough; default: qemu_log_mask(LOG_UNIMP, "%s: Unsupported offset 0x%"HWADDR_PRIx " value 0x%"PRIx64"\n", __func__, offset, value); break; } } diff --git a/hw/misc/aspeed_scu.c b/hw/misc/aspeed_scu.c index 8335364906..4a1ea2fa21 100644 --- a/hw/misc/aspeed_scu.c +++ b/hw/misc/aspeed_scu.c @@ -645,65 +645,65 @@ static uint64_t aspeed_ast2600_scu_read(void *opaque, hwaddr offset, static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset, uint64_t data64, unsigned size) { AspeedSCUState *s = ASPEED_SCU(opaque); int reg = TO_REG(offset); /* Truncate here so bitwise operations below behave as expected */ uint32_t data = data64; if (reg >= ASPEED_AST2600_SCU_NR_REGS) { qemu_log_mask(LOG_GUEST_ERROR, "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", __func__, offset); return; } if (reg > PROT_KEY && !s->regs[PROT_KEY]) { qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); } trace_aspeed_scu_write(offset, size, data); switch (reg) { case AST2600_PROT_KEY: s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; return; case AST2600_HW_STRAP1: case AST2600_HW_STRAP2: if (s->regs[reg + 2]) { return; } - /* fall through */ + fallthrough; case AST2600_SYS_RST_CTRL: case AST2600_SYS_RST_CTRL2: case AST2600_CLK_STOP_CTRL: case AST2600_CLK_STOP_CTRL2: /* W1S (Write 1 to set) registers */ s->regs[reg] |= data; return; case AST2600_SYS_RST_CTRL_CLR: case AST2600_SYS_RST_CTRL2_CLR: case AST2600_CLK_STOP_CTRL_CLR: case AST2600_CLK_STOP_CTRL2_CLR: case AST2600_HW_STRAP1_CLR: case AST2600_HW_STRAP2_CLR: /* * W1C (Write 1 to clear) registers are offset by one address from * the data register */ s->regs[reg - 1] &= ~data; return; case AST2600_RNG_DATA: case AST2600_SILICON_REV: case AST2600_SILICON_REV2: case AST2600_CHIP_ID0: case AST2600_CHIP_ID1: /* Add read only registers here */ qemu_log_mask(LOG_GUEST_ERROR, "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", __func__, offset); return; } s->regs[reg] = data; } diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c index 4ed9faa54a..98170f34a6 100644 --- a/hw/misc/bcm2835_property.c +++ b/hw/misc/bcm2835_property.c @@ -24,303 +24,303 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value) { uint32_t tag; uint32_t bufsize; uint32_t tot_len; size_t resplen; uint32_t tmp; int n; uint32_t offset, length, color; /* * Copy the current state of the framebuffer config; we will update * this copy as we process tags and then ask the framebuffer to use * it at the end. */ BCM2835FBConfig fbconfig = s->fbdev->config; bool fbconfig_updated = false; value &= ~0xf; s->addr = value; tot_len = ldl_le_phys(&s->dma_as, value); /* @(addr + 4) : Buffer response code */ value = s->addr + 8; while (value + 8 <= s->addr + tot_len) { tag = ldl_le_phys(&s->dma_as, value); bufsize = ldl_le_phys(&s->dma_as, value + 4); /* @(value + 8) : Request/response indicator */ resplen = 0; switch (tag) { case RPI_FWREQ_PROPERTY_END: break; case RPI_FWREQ_GET_FIRMWARE_REVISION: stl_le_phys(&s->dma_as, value + 12, 346337); resplen = 4; break; case RPI_FWREQ_GET_BOARD_MODEL: qemu_log_mask(LOG_UNIMP, "bcm2835_property: 0x%08x get board model NYI\n", tag); resplen = 4; break; case RPI_FWREQ_GET_BOARD_REVISION: stl_le_phys(&s->dma_as, value + 12, s->board_rev); resplen = 4; break; case RPI_FWREQ_GET_BOARD_MAC_ADDRESS: resplen = sizeof(s->macaddr.a); dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen, MEMTXATTRS_UNSPECIFIED); break; case RPI_FWREQ_GET_BOARD_SERIAL: qemu_log_mask(LOG_UNIMP, "bcm2835_property: 0x%08x get board serial NYI\n", tag); resplen = 8; break; case RPI_FWREQ_GET_ARM_MEMORY: /* base */ stl_le_phys(&s->dma_as, value + 12, 0); /* size */ stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base); resplen = 8; break; case RPI_FWREQ_GET_VC_MEMORY: /* base */ stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base); /* size */ stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size); resplen = 8; break; case RPI_FWREQ_SET_POWER_STATE: /* Assume that whatever device they asked for exists, * and we'll just claim we set it to the desired state */ tmp = ldl_le_phys(&s->dma_as, value + 16); stl_le_phys(&s->dma_as, value + 16, (tmp & 1)); resplen = 8; break; /* Clocks */ case RPI_FWREQ_GET_CLOCK_STATE: stl_le_phys(&s->dma_as, value + 16, 0x1); resplen = 8; break; case RPI_FWREQ_SET_CLOCK_STATE: qemu_log_mask(LOG_UNIMP, "bcm2835_property: 0x%08x set clock state NYI\n", tag); resplen = 8; break; case RPI_FWREQ_GET_CLOCK_RATE: case RPI_FWREQ_GET_MAX_CLOCK_RATE: case RPI_FWREQ_GET_MIN_CLOCK_RATE: switch (ldl_le_phys(&s->dma_as, value + 12)) { case RPI_FIRMWARE_EMMC_CLK_ID: stl_le_phys(&s->dma_as, value + 16, RPI_FIRMWARE_EMMC_CLK_RATE); break; case RPI_FIRMWARE_UART_CLK_ID: stl_le_phys(&s->dma_as, value + 16, RPI_FIRMWARE_UART_CLK_RATE); break; case RPI_FIRMWARE_CORE_CLK_ID: stl_le_phys(&s->dma_as, value + 16, RPI_FIRMWARE_CORE_CLK_RATE); break; default: stl_le_phys(&s->dma_as, value + 16, RPI_FIRMWARE_DEFAULT_CLK_RATE); break; } resplen = 8; break; case RPI_FWREQ_SET_CLOCK_RATE: case RPI_FWREQ_SET_MAX_CLOCK_RATE: case RPI_FWREQ_SET_MIN_CLOCK_RATE: qemu_log_mask(LOG_UNIMP, "bcm2835_property: 0x%08x set clock rate NYI\n", tag); resplen = 8; break; /* Temperature */ case RPI_FWREQ_GET_TEMPERATURE: stl_le_phys(&s->dma_as, value + 16, 25000); resplen = 8; break; case RPI_FWREQ_GET_MAX_TEMPERATURE: stl_le_phys(&s->dma_as, value + 16, 99000); resplen = 8; break; /* Frame buffer */ case RPI_FWREQ_FRAMEBUFFER_ALLOCATE: stl_le_phys(&s->dma_as, value + 12, fbconfig.base); stl_le_phys(&s->dma_as, value + 16, bcm2835_fb_get_size(&fbconfig)); resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_RELEASE: resplen = 0; break; case RPI_FWREQ_FRAMEBUFFER_BLANK: resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_TEST_PHYSICAL_WIDTH_HEIGHT: case RPI_FWREQ_FRAMEBUFFER_TEST_VIRTUAL_WIDTH_HEIGHT: resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_SET_PHYSICAL_WIDTH_HEIGHT: fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12); fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; - /* fall through */ + fallthrough; case RPI_FWREQ_FRAMEBUFFER_GET_PHYSICAL_WIDTH_HEIGHT: stl_le_phys(&s->dma_as, value + 12, fbconfig.xres); stl_le_phys(&s->dma_as, value + 16, fbconfig.yres); resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_SET_VIRTUAL_WIDTH_HEIGHT: fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12); fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; - /* fall through */ + fallthrough; case RPI_FWREQ_FRAMEBUFFER_GET_VIRTUAL_WIDTH_HEIGHT: stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual); stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual); resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_TEST_DEPTH: resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_SET_DEPTH: fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; - /* fall through */ + fallthrough; case RPI_FWREQ_FRAMEBUFFER_GET_DEPTH: stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp); resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_TEST_PIXEL_ORDER: resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_SET_PIXEL_ORDER: fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; - /* fall through */ + fallthrough; case RPI_FWREQ_FRAMEBUFFER_GET_PIXEL_ORDER: stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo); resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_TEST_ALPHA_MODE: resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_SET_ALPHA_MODE: fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; - /* fall through */ + fallthrough; case RPI_FWREQ_FRAMEBUFFER_GET_ALPHA_MODE: stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha); resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_GET_PITCH: stl_le_phys(&s->dma_as, value + 12, bcm2835_fb_get_pitch(&fbconfig)); resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_TEST_VIRTUAL_OFFSET: resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_SET_VIRTUAL_OFFSET: fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12); fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; - /* fall through */ + fallthrough; case RPI_FWREQ_FRAMEBUFFER_GET_VIRTUAL_OFFSET: stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset); stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset); resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_GET_OVERSCAN: case RPI_FWREQ_FRAMEBUFFER_TEST_OVERSCAN: case RPI_FWREQ_FRAMEBUFFER_SET_OVERSCAN: stl_le_phys(&s->dma_as, value + 12, 0); stl_le_phys(&s->dma_as, value + 16, 0); stl_le_phys(&s->dma_as, value + 20, 0); stl_le_phys(&s->dma_as, value + 24, 0); resplen = 16; break; case RPI_FWREQ_FRAMEBUFFER_SET_PALETTE: offset = ldl_le_phys(&s->dma_as, value + 12); length = ldl_le_phys(&s->dma_as, value + 16); n = 0; while (n < length - offset) { color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2)); stl_le_phys(&s->dma_as, s->fbdev->vcram_base + ((offset + n) << 2), color); n++; } stl_le_phys(&s->dma_as, value + 12, 0); resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_GET_NUM_DISPLAYS: stl_le_phys(&s->dma_as, value + 12, 1); resplen = 4; break; case RPI_FWREQ_GET_DMA_CHANNELS: /* channels 2-5 */ stl_le_phys(&s->dma_as, value + 12, 0x003C); resplen = 4; break; case RPI_FWREQ_GET_COMMAND_LINE: /* * We follow the firmware behaviour: no NUL terminator is * written to the buffer, and if the buffer is too short * we report the required length in the response header * and copy nothing to the buffer. */ resplen = strlen(s->command_line); if (bufsize >= resplen) address_space_write(&s->dma_as, value + 12, MEMTXATTRS_UNSPECIFIED, s->command_line, resplen); break; default: qemu_log_mask(LOG_UNIMP, "bcm2835_property: unhandled tag 0x%08x\n", tag); break; } trace_bcm2835_mbox_property(tag, bufsize, resplen); if (tag == 0) { break; } stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen); value += bufsize + 12; } /* Reconfigure framebuffer if required */ if (fbconfig_updated) { bcm2835_fb_reconfigure(s->fbdev, &fbconfig); } /* Buffer response code */ stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31)); } diff --git a/hw/misc/mos6522.c b/hw/misc/mos6522.c index d6ba47bde9..a62349e6a0 100644 --- a/hw/misc/mos6522.c +++ b/hw/misc/mos6522.c @@ -296,97 +296,97 @@ static void mos6522_portB_write(MOS6522State *s) uint64_t mos6522_read(void *opaque, hwaddr addr, unsigned size) { MOS6522State *s = opaque; uint32_t val; int ctrl; int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); if (now >= s->timers[0].next_irq_time) { mos6522_timer1_update(s, &s->timers[0], now); s->ifr |= T1_INT; } if (now >= s->timers[1].next_irq_time) { mos6522_timer2_update(s, &s->timers[1], now); s->ifr |= T2_INT; } switch (addr) { case VIA_REG_B: val = s->b; ctrl = (s->pcr & CB2_CTRL_MASK) >> CB2_CTRL_SHIFT; if (!(ctrl & C2_IND)) { s->ifr &= ~CB2_INT; } s->ifr &= ~CB1_INT; mos6522_update_irq(s); break; case VIA_REG_A: qemu_log_mask(LOG_UNIMP, "Read access to register A with handshake"); - /* fall through */ + fallthrough; case VIA_REG_ANH: val = s->a; ctrl = (s->pcr & CA2_CTRL_MASK) >> CA2_CTRL_SHIFT; if (!(ctrl & C2_IND)) { s->ifr &= ~CA2_INT; } s->ifr &= ~CA1_INT; mos6522_update_irq(s); break; case VIA_REG_DIRB: val = s->dirb; break; case VIA_REG_DIRA: val = s->dira; break; case VIA_REG_T1CL: val = get_counter(s, &s->timers[0]) & 0xff; s->ifr &= ~T1_INT; mos6522_update_irq(s); break; case VIA_REG_T1CH: val = get_counter(s, &s->timers[0]) >> 8; mos6522_update_irq(s); break; case VIA_REG_T1LL: val = s->timers[0].latch & 0xff; break; case VIA_REG_T1LH: /* XXX: check this */ val = (s->timers[0].latch >> 8) & 0xff; break; case VIA_REG_T2CL: val = get_counter(s, &s->timers[1]) & 0xff; s->ifr &= ~T2_INT; mos6522_update_irq(s); break; case VIA_REG_T2CH: val = get_counter(s, &s->timers[1]) >> 8; break; case VIA_REG_SR: val = s->sr; s->ifr &= ~SR_INT; mos6522_update_irq(s); break; case VIA_REG_ACR: val = s->acr; break; case VIA_REG_PCR: val = s->pcr; break; case VIA_REG_IFR: val = s->ifr; if (s->ifr & s->ier) { val |= 0x80; } break; case VIA_REG_IER: val = s->ier | 0x80; break; default: g_assert_not_reached(); } if (addr != VIA_REG_IFR || val != 0) { trace_mos6522_read(addr, mos6522_reg_names[addr], val); } return val; } @@ -394,105 +394,105 @@ uint64_t mos6522_read(void *opaque, hwaddr addr, unsigned size) void mos6522_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { MOS6522State *s = opaque; MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(s); int ctrl; trace_mos6522_write(addr, mos6522_reg_names[addr], val); switch (addr) { case VIA_REG_B: s->b = (s->b & ~s->dirb) | (val & s->dirb); mdc->portB_write(s); ctrl = (s->pcr & CB2_CTRL_MASK) >> CB2_CTRL_SHIFT; if (!(ctrl & C2_IND)) { s->ifr &= ~CB2_INT; } s->ifr &= ~CB1_INT; mos6522_update_irq(s); break; case VIA_REG_A: qemu_log_mask(LOG_UNIMP, "Write access to register A with handshake"); - /* fall through */ + fallthrough; case VIA_REG_ANH: s->a = (s->a & ~s->dira) | (val & s->dira); mdc->portA_write(s); ctrl = (s->pcr & CA2_CTRL_MASK) >> CA2_CTRL_SHIFT; if (!(ctrl & C2_IND)) { s->ifr &= ~CA2_INT; } s->ifr &= ~CA1_INT; mos6522_update_irq(s); break; case VIA_REG_DIRB: s->dirb = val; break; case VIA_REG_DIRA: s->dira = val; break; case VIA_REG_T1CL: s->timers[0].latch = (s->timers[0].latch & 0xff00) | val; mos6522_timer1_update(s, &s->timers[0], qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); break; case VIA_REG_T1CH: s->timers[0].latch = (s->timers[0].latch & 0xff) | (val << 8); s->ifr &= ~T1_INT; set_counter(s, &s->timers[0], s->timers[0].latch); break; case VIA_REG_T1LL: s->timers[0].latch = (s->timers[0].latch & 0xff00) | val; mos6522_timer1_update(s, &s->timers[0], qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); break; case VIA_REG_T1LH: s->timers[0].latch = (s->timers[0].latch & 0xff) | (val << 8); s->ifr &= ~T1_INT; mos6522_timer1_update(s, &s->timers[0], qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); break; case VIA_REG_T2CL: s->timers[1].latch = (s->timers[1].latch & 0xff00) | val; break; case VIA_REG_T2CH: /* To ensure T2 generates an interrupt on zero crossing with the common timer code, write the value directly from the latch to the counter */ s->timers[1].latch = (s->timers[1].latch & 0xff) | (val << 8); s->ifr &= ~T2_INT; set_counter(s, &s->timers[1], s->timers[1].latch); break; case VIA_REG_SR: s->sr = val; break; case VIA_REG_ACR: s->acr = val; mos6522_timer1_update(s, &s->timers[0], qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); break; case VIA_REG_PCR: s->pcr = val; break; case VIA_REG_IFR: /* reset bits */ s->ifr &= ~val; mos6522_update_irq(s); break; case VIA_REG_IER: if (val & IER_SET) { /* set bits */ s->ier |= val & 0x7f; } else { /* reset bits */ s->ier &= ~val; } mos6522_update_irq(s); /* if IER is modified starts needed timers */ mos6522_timer1_update(s, &s->timers[0], qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); mos6522_timer2_update(s, &s->timers[1], qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); break; default: g_assert_not_reached(); } }