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* Copyright (c) 2003-2004 Jakub Jermar
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* - The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/** @addtogroup mips32
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#include <arch/exception.h>
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#include <userspace.h>
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#include <proc/thread.h>
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#include <proc/uarg.h>
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#include <console/console.h>
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#include <syscall/syscall.h>
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#include <sysinfo/sysinfo.h>
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#include <arch/interrupt.h>
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#include <console/chardev.h>
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#include <arch/barrier.h>
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#include <arch/debugger.h>
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#include <genarch/fb/fb.h>
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#include <genarch/fb/visuals.h>
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#include <genarch/drivers/dsrln/dsrlnin.h>
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#include <genarch/drivers/dsrln/dsrlnout.h>
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#include <genarch/srln/srln.h>
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#include <arch/drivers/msim.h>
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#include <arch/asm/regname.h>
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/* Size of the code jumping to the exception handler code
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#define EXCEPTION_JUMP_SIZE 8
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#define TLB_EXC ((char *) 0x80000000)
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#define NORM_EXC ((char *) 0x80000180)
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#define CACHE_EXC ((char *) 0x80000100)
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/* Why the linker moves the variable 64K away in assembler
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* when not in .text section?
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/* Stack pointer saved when entering user mode */
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uintptr_t supervisor_sp __attribute__ ((section (".text")));
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/** Performs mips32-specific initialization before main_bsp() is called. */
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void arch_pre_main(void *entry __attribute__((unused)), bootinfo_t *bootinfo)
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init.cnt = bootinfo->cnt;
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for (i = 0; i < min3(bootinfo->cnt, TASKMAP_MAX_RECORDS, CONFIG_INIT_TASKS); i++) {
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init.tasks[i].addr = bootinfo->tasks[i].addr;
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init.tasks[i].size = bootinfo->tasks[i].size;
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str_cpy(init.tasks[i].name, CONFIG_TASK_NAME_BUFLEN,
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bootinfo->tasks[i].name);
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for (i = 0; i < CPUMAP_MAX_RECORDS; i++) {
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if ((bootinfo->cpumap & (1 << i)) != 0)
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void arch_pre_mm_init(void)
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/* It is not assumed by default */
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interrupts_disable();
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/* Initialize dispatch table */
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/* Copy the exception vectors to the right places */
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memcpy(TLB_EXC, (char *) tlb_refill_entry, EXCEPTION_JUMP_SIZE);
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smc_coherence_block(TLB_EXC, EXCEPTION_JUMP_SIZE);
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memcpy(NORM_EXC, (char *) exception_entry, EXCEPTION_JUMP_SIZE);
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smc_coherence_block(NORM_EXC, EXCEPTION_JUMP_SIZE);
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memcpy(CACHE_EXC, (char *) cache_error_entry, EXCEPTION_JUMP_SIZE);
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smc_coherence_block(CACHE_EXC, EXCEPTION_JUMP_SIZE);
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* Switch to BEV normal level so that exception vectors point to the
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* kernel. Clear the error level.
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cp0_status_write(cp0_status_read() &
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~(cp0_status_bev_bootstrap_bit | cp0_status_erl_error_bit));
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* Mask all interrupts
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void arch_post_mm_init(void)
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/* GXemul framebuffer */
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fb_properties_t gxemul_prop = {
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.visual = VISUAL_RGB_8_8_8,
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fb_init(&gxemul_prop);
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#ifdef CONFIG_MIPS_PRN
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dsrlnout_init((ioport8_t *) MSIM_KBD_ADDRESS);
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#endif /* CONFIG_MIPS_PRN */
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#endif /* CONFIG_FB */
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void arch_post_cpu_init(void)
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void arch_pre_smp_init(void)
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void arch_post_smp_init(void)
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#ifdef CONFIG_MIPS_KBD
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* Initialize the msim/GXemul keyboard port. Then initialize the serial line
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* module and connect it to the msim/GXemul keyboard. Enable keyboard interrupts.
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dsrlnin_instance_t *dsrlnin_instance
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= dsrlnin_init((dsrlnin_t *) MSIM_KBD_ADDRESS, MSIM_KBD_IRQ);
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if (dsrlnin_instance) {
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srln_instance_t *srln_instance = srln_init();
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indev_t *sink = stdin_wire();
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indev_t *srln = srln_wire(srln_instance, sink);
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dsrlnin_wire(dsrlnin_instance, srln);
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cp0_unmask_int(MSIM_KBD_IRQ);
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* This is the necessary evil until the userspace driver is entirely
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sysinfo_set_item_val("kbd", NULL, true);
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sysinfo_set_item_val("kbd.inr", NULL, MSIM_KBD_IRQ);
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sysinfo_set_item_val("kbd.address.virtual", NULL, MSIM_KBD_ADDRESS);
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void calibrate_delay_loop(void)
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void userspace(uspace_arg_t *kernel_uarg)
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/* EXL = 1, UM = 1, IE = 1 */
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cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
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cp0_status_um_bit | cp0_status_ie_enabled_bit));
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cp0_epc_write((uintptr_t) kernel_uarg->uspace_entry);
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userspace_asm(((uintptr_t) kernel_uarg->uspace_stack + PAGE_SIZE),
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(uintptr_t) kernel_uarg->uspace_uarg,
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(uintptr_t) kernel_uarg->uspace_entry);
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/** Perform mips32 specific tasks needed before the new task is run. */
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void before_task_runs_arch(void)
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/** Perform mips32 specific tasks needed before the new thread is scheduled. */
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void before_thread_runs_arch(void)
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supervisor_sp = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE -
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void after_thread_ran_arch(void)
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/** Set thread-local-storage pointer
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* We have it currently in K1, it is
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* possible to have it separately in the future.
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unative_t sys_tls_set(unative_t addr)
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void arch_reboot(void)
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/** Construct function pointer
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* @param fptr function pointer structure
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* @param addr function address
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* @param caller calling function address
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* @return address of the function pointer
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void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
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void arch_grab_console(void)
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/** Return console to userspace
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void arch_release_console(void)