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  1. /*
  2.  * Copyright (c) 2003-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup mips32
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch.h>
  36. #include <arch/cp0.h>
  37. #include <arch/exception.h>
  38. #include <mm/as.h>
  39.  
  40. #include <userspace.h>
  41. #include <arch/console.h>
  42. #include <memstr.h>
  43. #include <proc/thread.h>
  44. #include <proc/uarg.h>
  45. #include <print.h>
  46. #include <syscall/syscall.h>
  47. #include <sysinfo/sysinfo.h>
  48.  
  49. #include <arch/interrupt.h>
  50. #include <console/chardev.h>
  51. #include <arch/barrier.h>
  52. #include <arch/debugger.h>
  53. #include <genarch/fb/fb.h>
  54. #include <genarch/fb/visuals.h>
  55. #include <genarch/drivers/dsrln/dsrlnin.h>
  56. #include <genarch/drivers/dsrln/dsrlnout.h>
  57. #include <genarch/srln/srln.h>
  58. #include <macros.h>
  59. #include <config.h>
  60. #include <string.h>
  61. #include <arch/drivers/msim.h>
  62.  
  63. #include <arch/asm/regname.h>
  64.  
  65. /* Size of the code jumping to the exception handler code
  66.  * - J+NOP
  67.  */
  68. #define EXCEPTION_JUMP_SIZE  8
  69.  
  70. #define TLB_EXC    ((char *) 0x80000000)
  71. #define NORM_EXC   ((char *) 0x80000180)
  72. #define CACHE_EXC  ((char *) 0x80000100)
  73.  
  74.  
  75. /* Why the linker moves the variable 64K away in assembler
  76.  * when not in .text section?
  77.  */
  78.  
  79. /* Stack pointer saved when entering user mode */
  80. uintptr_t supervisor_sp __attribute__ ((section (".text")));
  81.  
  82. count_t cpu_count = 0;
  83.  
  84. /** Performs mips32-specific initialization before main_bsp() is called. */
  85. void arch_pre_main(void *entry __attribute__((unused)), bootinfo_t *bootinfo)
  86. {
  87.     /* Setup usermode */
  88.     init.cnt = bootinfo->cnt;
  89.    
  90.     count_t i;
  91.     for (i = 0; i < min3(bootinfo->cnt, TASKMAP_MAX_RECORDS, CONFIG_INIT_TASKS); i++) {
  92.         init.tasks[i].addr = bootinfo->tasks[i].addr;
  93.         init.tasks[i].size = bootinfo->tasks[i].size;
  94.         strncpy(init.tasks[i].name, bootinfo->tasks[i].name,
  95.             CONFIG_TASK_NAME_BUFLEN);
  96.     }
  97.    
  98.     for (i = 0; i < CPUMAP_MAX_RECORDS; i++) {
  99.         if ((bootinfo->cpumap & (1 << i)) != 0)
  100.             cpu_count++;
  101.     }
  102. }
  103.  
  104. void arch_pre_mm_init(void)
  105. {
  106.     /* It is not assumed by default */
  107.     interrupts_disable();
  108.    
  109.     /* Initialize dispatch table */
  110.     exception_init();
  111.  
  112.     /* Copy the exception vectors to the right places */
  113.     memcpy(TLB_EXC, (char *) tlb_refill_entry, EXCEPTION_JUMP_SIZE);
  114.     smc_coherence_block(TLB_EXC, EXCEPTION_JUMP_SIZE);
  115.     memcpy(NORM_EXC, (char *) exception_entry, EXCEPTION_JUMP_SIZE);
  116.     smc_coherence_block(NORM_EXC, EXCEPTION_JUMP_SIZE);
  117.     memcpy(CACHE_EXC, (char *) cache_error_entry, EXCEPTION_JUMP_SIZE);
  118.     smc_coherence_block(CACHE_EXC, EXCEPTION_JUMP_SIZE);
  119.    
  120.     /*
  121.      * Switch to BEV normal level so that exception vectors point to the
  122.      * kernel. Clear the error level.
  123.      */
  124.     cp0_status_write(cp0_status_read() &
  125.         ~(cp0_status_bev_bootstrap_bit | cp0_status_erl_error_bit));
  126.    
  127.     /*
  128.      * Mask all interrupts
  129.      */
  130.     cp0_mask_all_int();
  131.    
  132.     debugger_init();
  133. }
  134.  
  135. void arch_post_mm_init(void)
  136. {
  137.     interrupt_init();
  138.    
  139. #ifdef CONFIG_FB
  140.     /* GXemul framebuffer */
  141.     fb_properties_t gxemul_prop = {
  142.         .addr = 0x12000000,
  143.         .offset = 0,
  144.         .x = 640,
  145.         .y = 480,
  146.         .scan = 1920,
  147.         .visual = VISUAL_BGR_8_8_8,
  148.     };
  149.     fb_init(&gxemul_prop);
  150. #else
  151. #ifdef CONFIG_MIPS_PRN
  152.     dsrlnout_init((ioport8_t *) MSIM_KBD_ADDRESS);
  153. #endif /* CONFIG_MIPS_PRN */
  154. #endif /* CONFIG_FB */
  155. }
  156.  
  157. void arch_post_cpu_init(void)
  158. {
  159. }
  160.  
  161. void arch_pre_smp_init(void)
  162. {
  163. }
  164.  
  165. void arch_post_smp_init(void)
  166. {
  167. #ifdef CONFIG_MIPS_KBD
  168.     /*
  169.      * Initialize the msim/GXemul keyboard port. Then initialize the serial line
  170.      * module and connect it to the msim/GXemul keyboard. Enable keyboard interrupts.
  171.      */
  172.     indev_t *kbrdin = dsrlnin_init((dsrlnin_t *) MSIM_KBD_ADDRESS, MSIM_KBD_IRQ);
  173.     if (kbrdin) {
  174.         srln_init(kbrdin);
  175.         cp0_unmask_int(MSIM_KBD_IRQ);
  176.     }
  177.    
  178.     /*
  179.      * This is the necessary evil until the userspace driver is entirely
  180.      * self-sufficient.
  181.      */
  182.     sysinfo_set_item_val("kbd", NULL, true);
  183.     sysinfo_set_item_val("kbd.inr", NULL, MSIM_KBD_IRQ);
  184.     sysinfo_set_item_val("kbd.address.virtual", NULL, MSIM_KBD_ADDRESS);
  185. #endif
  186. }
  187.  
  188. void calibrate_delay_loop(void)
  189. {
  190. }
  191.  
  192. void userspace(uspace_arg_t *kernel_uarg)
  193. {
  194.     /* EXL = 1, UM = 1, IE = 1 */
  195.     cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
  196.         cp0_status_um_bit | cp0_status_ie_enabled_bit));
  197.     cp0_epc_write((uintptr_t) kernel_uarg->uspace_entry);
  198.     userspace_asm(((uintptr_t) kernel_uarg->uspace_stack + PAGE_SIZE),
  199.         (uintptr_t) kernel_uarg->uspace_uarg,
  200.         (uintptr_t) kernel_uarg->uspace_entry);
  201.    
  202.     while (1);
  203. }
  204.  
  205. /** Perform mips32 specific tasks needed before the new task is run. */
  206. void before_task_runs_arch(void)
  207. {
  208. }
  209.  
  210. /** Perform mips32 specific tasks needed before the new thread is scheduled. */
  211. void before_thread_runs_arch(void)
  212. {
  213.     supervisor_sp = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE -
  214.         SP_DELTA];
  215. }
  216.  
  217. void after_thread_ran_arch(void)
  218. {
  219. }
  220.  
  221. /** Set thread-local-storage pointer
  222.  *
  223.  * We have it currently in K1, it is
  224.  * possible to have it separately in the future.
  225.  */
  226. unative_t sys_tls_set(unative_t addr)
  227. {
  228.     return 0;
  229. }
  230.  
  231. void arch_reboot(void)
  232. {
  233.     ___halt();
  234.     while (1);
  235. }
  236.  
  237. /** Construct function pointer
  238.  *
  239.  * @param fptr   function pointer structure
  240.  * @param addr   function address
  241.  * @param caller calling function address
  242.  *
  243.  * @return address of the function pointer
  244.  *
  245.  */
  246. void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
  247. {
  248.     return addr;
  249. }
  250.  
  251. /** @}
  252.  */
  253.