/* ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, 2011,2012 Giovanni Di Sirio. This file is part of ChibiOS/RT. ChibiOS/RT 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 3 of the License, or (at your option) any later version. ChibiOS/RT 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 . --- A special exception to the GPL can be applied should you wish to distribute a combined work that includes ChibiOS/RT, without being obliged to provide the source code for any proprietary components. See the file exception.txt for full details of how and when the exception can be applied. */ /** * @addtogroup SIMIA32_CORE * @{ */ #ifndef _CHCORE_H_ #define _CHCORE_H_ #if CH_DBG_ENABLE_STACK_CHECK #error "option CH_DBG_ENABLE_STACK_CHECK not supported by this port" #endif /** * Macro defining the a simulated architecture into x86. */ #define CH_ARCHITECTURE_SIMIA32 /** * Name of the implemented architecture. */ #define CH_ARCHITECTURE_NAME "Simulator" /** * @brief Name of the architecture variant (optional). */ #define CH_CORE_VARIANT_NAME "x86 (integer only)" /** * @brief Name of the compiler supported by this port. */ #define CH_COMPILER_NAME "GCC " __VERSION__ /** * @brief Port-specific information string. */ #define CH_PORT_INFO "No preemption" /** * 16 bytes stack alignment. */ typedef struct { uint8_t a[16]; } stkalign_t __attribute__((aligned(16))); /** * Generic x86 register. */ typedef void *regx86; /** * Interrupt saved context. * This structure represents the stack frame saved during a preemption-capable * interrupt handler. */ struct extctx { }; /** * System saved context. * @note In this demo the floating point registers are not saved. */ struct intctx { regx86 ebx; regx86 edi; regx86 esi; regx86 ebp; regx86 eip; }; /** * Platform dependent part of the @p Thread structure. * This structure usually contains just the saved stack pointer defined as a * pointer to a @p intctx structure. */ struct context { struct intctx volatile *esp; }; #define APUSH(p, a) (p) -= sizeof(void *), *(void **)(p) = (void*)(a) /* Darwin requires the stack to be aligned to a 16-byte boundary at * the time of a call instruction (in case the called function needs * to save MMX registers). This aligns to 'mod' module 16, so that we'll end * up with the right alignment after pushing the args. */ #define AALIGN(p, mask, mod) p = (void *)((((uintptr_t)(p) - mod) & ~mask) + mod) /** * Platform dependent part of the @p chThdCreateI() API. * This code usually setup the context switching frame represented by a * @p intctx structure. */ #define SETUP_CONTEXT(workspace, wsize, pf, arg) { \ uint8_t *esp = (uint8_t *)workspace + wsize; \ APUSH(esp, 0); \ uint8_t *savebp = esp; \ AALIGN(esp, 15, 8); \ APUSH(esp, arg); \ APUSH(esp, pf); \ APUSH(esp, 0); \ esp -= sizeof(struct intctx); \ ((struct intctx *)esp)->eip = _port_thread_start; \ ((struct intctx *)esp)->ebx = 0; \ ((struct intctx *)esp)->edi = 0; \ ((struct intctx *)esp)->esi = 0; \ ((struct intctx *)esp)->ebp = savebp; \ tp->p_ctx.esp = (struct intctx *)esp; \ } /** * Stack size for the system idle thread. */ #ifndef PORT_IDLE_THREAD_STACK_SIZE #define PORT_IDLE_THREAD_STACK_SIZE 256 #endif /** * Per-thread stack overhead for interrupts servicing, it is used in the * calculation of the correct working area size. * It requires stack space because the simulated "interrupt handlers" can * invoke host library functions inside so it better have a lot of space. */ #ifndef PORT_INT_REQUIRED_STACK #define PORT_INT_REQUIRED_STACK 16384 #endif /** * Enforces a correct alignment for a stack area size value. */ #define STACK_ALIGN(n) ((((n) - 1) | (sizeof(stkalign_t) - 1)) + 1) /** * Computes the thread working area global size. */ #define THD_WA_SIZE(n) STACK_ALIGN(sizeof(Thread) + \ sizeof(void *) * 4 + \ sizeof(struct intctx) + \ sizeof(struct extctx) + \ (n) + (PORT_INT_REQUIRED_STACK)) /** * Macro used to allocate a thread working area aligned as both position and * size. */ #define WORKING_AREA(s, n) stkalign_t s[THD_WA_SIZE(n) / sizeof(stkalign_t)] /** * IRQ prologue code, inserted at the start of all IRQ handlers enabled to * invoke system APIs. */ #define PORT_IRQ_PROLOGUE() /** * IRQ epilogue code, inserted at the end of all IRQ handlers enabled to * invoke system APIs. */ #define PORT_IRQ_EPILOGUE() /** * IRQ handler function declaration. */ #define PORT_IRQ_HANDLER(id) void id(void) /** * Simulator initialization. */ #define port_init() /** * Does nothing in this simulator. */ #define port_lock() asm volatile("nop") /** * Does nothing in this simulator. */ #define port_unlock() asm volatile("nop") /** * Does nothing in this simulator. */ #define port_lock_from_isr() /** * Does nothing in this simulator. */ #define port_unlock_from_isr() /** * Does nothing in this simulator. */ #define port_disable() /** * Does nothing in this simulator. */ #define port_suspend() /** * Does nothing in this simulator. */ #define port_enable() /** * In the simulator this does a polling pass on the simulated interrupt * sources. */ #define port_wait_for_interrupt() ChkIntSources() #ifdef __cplusplus extern "C" { #endif __attribute__((fastcall)) void port_switch(Thread *ntp, Thread *otp); __attribute__((fastcall)) void port_halt(void); __attribute__((cdecl, noreturn)) void _port_thread_start(msg_t (*pf)(void *), void *p); void ChkIntSources(void); #ifdef __cplusplus } #endif #endif /* _CHCORE_H_ */ /** @} */