4  * Copyright (c) 2016-2020 Michael Rolnik
18  * <http://www.gnu.org/licenses/lgpl-2.1.html>
23 #include "qemu/error-report.h"
25 #include "accel/tcg/cpu-ops.h"
27 #include "exec/page-protection.h"
29 #include "accel/tcg/cpu-ldst.h"
30 #include "exec/helper-proto.h"
41     if (env->skip) {  in avr_cpu_exec_interrupt()
47             cs->exception_index = EXCP_RESET;  in avr_cpu_exec_interrupt()
50             cs->interrupt_request &= ~CPU_INTERRUPT_RESET;  in avr_cpu_exec_interrupt()
55         if (cpu_interrupts_enabled(env) && env->intsrc != 0) {  in avr_cpu_exec_interrupt()
56             int index = ctz64(env->intsrc);  in avr_cpu_exec_interrupt()
57             cs->exception_index = EXCP_INT(index);  in avr_cpu_exec_interrupt()
60             env->intsrc &= env->intsrc - 1; /* clear the interrupt */  in avr_cpu_exec_interrupt()
61             if (!env->intsrc) {  in avr_cpu_exec_interrupt()
62                 cs->interrupt_request &= ~CPU_INTERRUPT_HARD;  in avr_cpu_exec_interrupt()
79     uint32_t ret = env->pc_w;  in avr_cpu_do_interrupt()
84     if (cs->exception_index == EXCP_RESET) {  in avr_cpu_do_interrupt()
86     } else if (env->intsrc != 0) {  in avr_cpu_do_interrupt()
87         vector = ctz64(env->intsrc) + 1;  in avr_cpu_do_interrupt()
91         do_stb(env, env->sp--, ret, 0);  in avr_cpu_do_interrupt()
92         do_stb(env, env->sp--, ret >> 8, 0);  in avr_cpu_do_interrupt()
93         do_stb(env, env->sp--, ret >> 16, 0);  in avr_cpu_do_interrupt()
95         do_stb(env, env->sp--, ret, 0);  in avr_cpu_do_interrupt()
96         do_stb(env, env->sp--, ret >> 8, 0);  in avr_cpu_do_interrupt()
98         do_stb(env, env->sp--, ret, 0);  in avr_cpu_do_interrupt()
101     env->pc_w = base + vector * size;  in avr_cpu_do_interrupt()
102     env->sregI = 0; /* clear Global Interrupt Flag */  in avr_cpu_do_interrupt()
104     cs->exception_index = -1;  in avr_cpu_do_interrupt()
155     cs->exception_index = EXCP_HLT;  in helper_sleep()
167     cs->exception_index = EXCP_DEBUG;  in helper_unsupported()
179     cs->exception_index = EXCP_DEBUG;  in helper_debug()
187     cs->exception_index = EXCP_DEBUG;  in helper_break()
193     qemu_log_mask(LOG_UNIMP, "WDG reset (not implemented)\n");  in helper_wdr()
199  * does not expect global temps to be modified -- a global may be
201  * read these, as TCG does make sure the global temps are saved
210     return env->r[addr];  in avr_cpu_reg1_read()
214  * The range 0x38-0x3f of the i/o space is mapped to cpu regs.
224         return 0xff & (env->rampD >> 16);  in avr_cpu_reg2_read()
226         return 0xff & (env->rampX >> 16);  in avr_cpu_reg2_read()
228         return 0xff & (env->rampY >> 16);  in avr_cpu_reg2_read()
230         return 0xff & (env->rampZ >> 16);  in avr_cpu_reg2_read()
232         return 0xff & (env->eind >> 16);  in avr_cpu_reg2_read()
234         return env->sp & 0x00ff;  in avr_cpu_reg2_read()
236         return 0xff & (env->sp >> 8);  in avr_cpu_reg2_read()
249     env->fullacc = true;  in avr_cpu_trap_write()
250     cpu_loop_exit_restore(cs, cs->mem_io_pc);  in avr_cpu_trap_write()
275     env->fullacc = false;  in helper_fullwr()
280         env->r[addr] = data;  in helper_fullwr()
285             env->rampD = data << 16;  in helper_fullwr()
290             env->rampX = data << 16;  in helper_fullwr()
295             env->rampY = data << 16;  in helper_fullwr()
300             env->rampZ = data << 16;  in helper_fullwr()
304         env->eind = data << 16;  in helper_fullwr()
307         env->sp = (env->sp & 0xff00) | data;  in helper_fullwr()
311             env->sp = (env->sp & 0x00ff) | (data << 8);  in helper_fullwr()