diff options
Diffstat (limited to 'hw/slavio_intctl.c')
| -rw-r--r-- | hw/slavio_intctl.c | 400 |
1 files changed, 0 insertions, 400 deletions
diff --git a/hw/slavio_intctl.c b/hw/slavio_intctl.c deleted file mode 100644 index 288fb50..0000000 --- a/hw/slavio_intctl.c +++ /dev/null @@ -1,400 +0,0 @@ -/* - * QEMU Sparc SLAVIO interrupt controller emulation - * - * Copyright (c) 2003-2005 Fabrice Bellard - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ -#include "vl.h" -//#define DEBUG_IRQ_COUNT -//#define DEBUG_IRQ - -#ifdef DEBUG_IRQ -#define DPRINTF(fmt, args...) \ -do { printf("IRQ: " fmt , ##args); } while (0) -#else -#define DPRINTF(fmt, args...) -#endif - -/* - * Registers of interrupt controller in sun4m. - * - * This is the interrupt controller part of chip STP2001 (Slave I/O), also - * produced as NCR89C105. See - * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt - * - * There is a system master controller and one for each cpu. - * - */ - -#define MAX_CPUS 16 - -typedef struct SLAVIO_INTCTLState { - uint32_t intreg_pending[MAX_CPUS]; - uint32_t intregm_pending; - uint32_t intregm_disabled; - uint32_t target_cpu; -#ifdef DEBUG_IRQ_COUNT - uint64_t irq_count[32]; -#endif - CPUState *cpu_envs[MAX_CPUS]; -} SLAVIO_INTCTLState; - -#define INTCTL_MAXADDR 0xf -#define INTCTLM_MAXADDR 0xf -static void slavio_check_interrupts(void *opaque); - -// per-cpu interrupt controller -static uint32_t slavio_intctl_mem_readl(void *opaque, target_phys_addr_t addr) -{ - SLAVIO_INTCTLState *s = opaque; - uint32_t saddr; - int cpu; - - cpu = (addr & (MAX_CPUS - 1) * TARGET_PAGE_SIZE) >> 12; - saddr = (addr & INTCTL_MAXADDR) >> 2; - switch (saddr) { - case 0: - return s->intreg_pending[cpu]; - default: - break; - } - return 0; -} - -static void slavio_intctl_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) -{ - SLAVIO_INTCTLState *s = opaque; - uint32_t saddr; - int cpu; - - cpu = (addr & (MAX_CPUS - 1) * TARGET_PAGE_SIZE) >> 12; - saddr = (addr & INTCTL_MAXADDR) >> 2; - switch (saddr) { - case 1: // clear pending softints - if (val & 0x4000) - val |= 80000000; - val &= 0xfffe0000; - s->intreg_pending[cpu] &= ~val; - DPRINTF("Cleared cpu %d irq mask %x, curmask %x\n", cpu, val, s->intreg_pending[cpu]); - break; - case 2: // set softint - val &= 0xfffe0000; - s->intreg_pending[cpu] |= val; - slavio_check_interrupts(s); - DPRINTF("Set cpu %d irq mask %x, curmask %x\n", cpu, val, s->intreg_pending[cpu]); - break; - default: - break; - } -} - -static CPUReadMemoryFunc *slavio_intctl_mem_read[3] = { - slavio_intctl_mem_readl, - slavio_intctl_mem_readl, - slavio_intctl_mem_readl, -}; - -static CPUWriteMemoryFunc *slavio_intctl_mem_write[3] = { - slavio_intctl_mem_writel, - slavio_intctl_mem_writel, - slavio_intctl_mem_writel, -}; - -// master system interrupt controller -static uint32_t slavio_intctlm_mem_readl(void *opaque, target_phys_addr_t addr) -{ - SLAVIO_INTCTLState *s = opaque; - uint32_t saddr; - - saddr = (addr & INTCTLM_MAXADDR) >> 2; - switch (saddr) { - case 0: - return s->intregm_pending & 0x7fffffff; - case 1: - return s->intregm_disabled; - case 4: - return s->target_cpu; - default: - break; - } - return 0; -} - -static void slavio_intctlm_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) -{ - SLAVIO_INTCTLState *s = opaque; - uint32_t saddr; - - saddr = (addr & INTCTLM_MAXADDR) >> 2; - switch (saddr) { - case 2: // clear (enable) - // Force clear unused bits - val &= ~0x4fb2007f; - s->intregm_disabled &= ~val; - DPRINTF("Enabled master irq mask %x, curmask %x\n", val, s->intregm_disabled); - slavio_check_interrupts(s); - break; - case 3: // set (disable, clear pending) - // Force clear unused bits - val &= ~0x4fb2007f; - s->intregm_disabled |= val; - s->intregm_pending &= ~val; - DPRINTF("Disabled master irq mask %x, curmask %x\n", val, s->intregm_disabled); - break; - case 4: - s->target_cpu = val & (MAX_CPUS - 1); - DPRINTF("Set master irq cpu %d\n", s->target_cpu); - break; - default: - break; - } -} - -static CPUReadMemoryFunc *slavio_intctlm_mem_read[3] = { - slavio_intctlm_mem_readl, - slavio_intctlm_mem_readl, - slavio_intctlm_mem_readl, -}; - -static CPUWriteMemoryFunc *slavio_intctlm_mem_write[3] = { - slavio_intctlm_mem_writel, - slavio_intctlm_mem_writel, - slavio_intctlm_mem_writel, -}; - -void slavio_pic_info(void *opaque) -{ - SLAVIO_INTCTLState *s = opaque; - int i; - - for (i = 0; i < MAX_CPUS; i++) { - term_printf("per-cpu %d: pending 0x%08x\n", i, s->intreg_pending[i]); - } - term_printf("master: pending 0x%08x, disabled 0x%08x\n", s->intregm_pending, s->intregm_disabled); -} - -void slavio_irq_info(void *opaque) -{ -#ifndef DEBUG_IRQ_COUNT - term_printf("irq statistic code not compiled.\n"); -#else - SLAVIO_INTCTLState *s = opaque; - int i; - int64_t count; - - term_printf("IRQ statistics:\n"); - for (i = 0; i < 32; i++) { - count = s->irq_count[i]; - if (count > 0) - term_printf("%2d: %" PRId64 "\n", i, count); - } -#endif -} - -static const uint32_t intbit_to_level[32] = { - 2, 3, 5, 7, 9, 11, 0, 14, 3, 5, 7, 9, 11, 13, 12, 12, - 6, 0, 4, 10, 8, 0, 11, 0, 0, 0, 0, 0, 15, 0, 15, 0, -}; - -static void slavio_check_interrupts(void *opaque) -{ - CPUState *env; - SLAVIO_INTCTLState *s = opaque; - uint32_t pending = s->intregm_pending; - unsigned int i, j, max = 0; - - pending &= ~s->intregm_disabled; - - if (pending && !(s->intregm_disabled & 0x80000000)) { - for (i = 0; i < 32; i++) { - if (pending & (1 << i)) { - if (max < intbit_to_level[i]) - max = intbit_to_level[i]; - } - } - env = s->cpu_envs[s->target_cpu]; - if (!env) { - DPRINTF("No CPU %d, not triggered (pending %x)\n", s->target_cpu, pending); - } - else { - if (env->halted) - env->halted = 0; - if (env->interrupt_index == 0) { - DPRINTF("Triggered CPU %d pil %d\n", s->target_cpu, max); -#ifdef DEBUG_IRQ_COUNT - s->irq_count[max]++; -#endif - env->interrupt_index = TT_EXTINT | max; - cpu_interrupt(env, CPU_INTERRUPT_HARD); - } - else - DPRINTF("Not triggered (pending %x), pending exception %x\n", pending, env->interrupt_index); - } - } - else - DPRINTF("Not triggered (pending %x), disabled %x\n", pending, s->intregm_disabled); - - for (i = 0; i < MAX_CPUS; i++) { - max = 0; - env = s->cpu_envs[i]; - if (!env) - continue; - for (j = 17; j < 32; j++) { - if (s->intreg_pending[i] & (1 << j)) { - if (max < j - 16) - max = j - 16; - } - } - if (max > 0) { - if (env->halted) - env->halted = 0; - if (env->interrupt_index == 0) { - DPRINTF("Triggered softint %d for cpu %d (pending %x)\n", max, i, pending); -#ifdef DEBUG_IRQ_COUNT - s->irq_count[max]++; -#endif - env->interrupt_index = TT_EXTINT | max; - cpu_interrupt(env, CPU_INTERRUPT_HARD); - } - } - } -} - -/* - * "irq" here is the bit number in the system interrupt register to - * separate serial and keyboard interrupts sharing a level. - */ -void slavio_pic_set_irq(void *opaque, int irq, int level) -{ - SLAVIO_INTCTLState *s = opaque; - - DPRINTF("Set cpu %d irq %d level %d\n", s->target_cpu, irq, level); - if (irq < 32) { - uint32_t mask = 1 << irq; - uint32_t pil = intbit_to_level[irq]; - if (pil > 0) { - if (level) { - s->intregm_pending |= mask; - s->intreg_pending[s->target_cpu] |= 1 << pil; - } - else { - s->intregm_pending &= ~mask; - s->intreg_pending[s->target_cpu] &= ~(1 << pil); - } - } - } - slavio_check_interrupts(s); -} - -void slavio_pic_set_irq_cpu(void *opaque, int irq, int level, unsigned int cpu) -{ - SLAVIO_INTCTLState *s = opaque; - - DPRINTF("Set cpu %d local irq %d level %d\n", cpu, irq, level); - if (cpu == (unsigned int)-1) { - slavio_pic_set_irq(opaque, irq, level); - return; - } - if (irq < 32) { - uint32_t pil = intbit_to_level[irq]; - if (pil > 0) { - if (level) { - s->intreg_pending[cpu] |= 1 << pil; - } - else { - s->intreg_pending[cpu] &= ~(1 << pil); - } - } - } - slavio_check_interrupts(s); -} - -static void slavio_intctl_save(QEMUFile *f, void *opaque) -{ - SLAVIO_INTCTLState *s = opaque; - int i; - - for (i = 0; i < MAX_CPUS; i++) { - qemu_put_be32s(f, &s->intreg_pending[i]); - } - qemu_put_be32s(f, &s->intregm_pending); - qemu_put_be32s(f, &s->intregm_disabled); - qemu_put_be32s(f, &s->target_cpu); -} - -static int slavio_intctl_load(QEMUFile *f, void *opaque, int version_id) -{ - SLAVIO_INTCTLState *s = opaque; - int i; - - if (version_id != 1) - return -EINVAL; - - for (i = 0; i < MAX_CPUS; i++) { - qemu_get_be32s(f, &s->intreg_pending[i]); - } - qemu_get_be32s(f, &s->intregm_pending); - qemu_get_be32s(f, &s->intregm_disabled); - qemu_get_be32s(f, &s->target_cpu); - return 0; -} - -static void slavio_intctl_reset(void *opaque) -{ - SLAVIO_INTCTLState *s = opaque; - int i; - - for (i = 0; i < MAX_CPUS; i++) { - s->intreg_pending[i] = 0; - } - s->intregm_disabled = ~0xffb2007f; - s->intregm_pending = 0; - s->target_cpu = 0; -} - -void slavio_intctl_set_cpu(void *opaque, unsigned int cpu, CPUState *env) -{ - SLAVIO_INTCTLState *s = opaque; - s->cpu_envs[cpu] = env; -} - -void *slavio_intctl_init(uint32_t addr, uint32_t addrg) -{ - int slavio_intctl_io_memory, slavio_intctlm_io_memory, i; - SLAVIO_INTCTLState *s; - - s = qemu_mallocz(sizeof(SLAVIO_INTCTLState)); - if (!s) - return NULL; - - for (i = 0; i < MAX_CPUS; i++) { - slavio_intctl_io_memory = cpu_register_io_memory(0, slavio_intctl_mem_read, slavio_intctl_mem_write, s); - cpu_register_physical_memory(addr + i * TARGET_PAGE_SIZE, INTCTL_MAXADDR, slavio_intctl_io_memory); - } - - slavio_intctlm_io_memory = cpu_register_io_memory(0, slavio_intctlm_mem_read, slavio_intctlm_mem_write, s); - cpu_register_physical_memory(addrg, INTCTLM_MAXADDR, slavio_intctlm_io_memory); - - register_savevm("slavio_intctl", addr, 1, slavio_intctl_save, slavio_intctl_load, s); - qemu_register_reset(slavio_intctl_reset, s); - slavio_intctl_reset(s); - return s; -} - |