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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 <ddi/device.h>
  60. #include <config.h>
  61. #include <string.h>
  62. #include <arch/drivers/msim.h>
  63.  
  64. #include <arch/asm/regname.h>
  65.  
  66. /* Size of the code jumping to the exception handler code
  67.  * - J+NOP
  68.  */
  69. #define EXCEPTION_JUMP_SIZE  8
  70.  
  71. #define TLB_EXC    ((char *) 0x80000000)
  72. #define NORM_EXC   ((char *) 0x80000180)
  73. #define CACHE_EXC  ((char *) 0x80000100)
  74.  
  75.  
  76. /* Why the linker moves the variable 64K away in assembler
  77.  * when not in .text section?
  78.  */
  79.  
  80. /* Stack pointer saved when entering user mode */
  81. uintptr_t supervisor_sp __attribute__ ((section (".text")));
  82.  
  83. count_t cpu_count = 0;
  84.  
  85. /** Performs mips32-specific initialization before main_bsp() is called. */
  86. void arch_pre_main(void *entry __attribute__((unused)), bootinfo_t *bootinfo)
  87. {
  88.     /* Setup usermode */
  89.     init.cnt = bootinfo->cnt;
  90.    
  91.     count_t i;
  92.     for (i = 0; i < min3(bootinfo->cnt, TASKMAP_MAX_RECORDS, CONFIG_INIT_TASKS); i++) {
  93.         init.tasks[i].addr = bootinfo->tasks[i].addr;
  94.         init.tasks[i].size = bootinfo->tasks[i].size;
  95.         strncpy(init.tasks[i].name, bootinfo->tasks[i].name,
  96.             CONFIG_TASK_NAME_BUFLEN);
  97.     }
  98.    
  99.     for (i = 0; i < CPUMAP_MAX_RECORDS; i++) {
  100.         if ((bootinfo->cpumap & (1 << i)) != 0)
  101.             cpu_count++;
  102.     }
  103. }
  104.  
  105. void arch_pre_mm_init(void)
  106. {
  107.     /* It is not assumed by default */
  108.     interrupts_disable();
  109.    
  110.     /* Initialize dispatch table */
  111.     exception_init();
  112.  
  113.     /* Copy the exception vectors to the right places */
  114.     memcpy(TLB_EXC, (char *) tlb_refill_entry, EXCEPTION_JUMP_SIZE);
  115.     smc_coherence_block(TLB_EXC, EXCEPTION_JUMP_SIZE);
  116.     memcpy(NORM_EXC, (char *) exception_entry, EXCEPTION_JUMP_SIZE);
  117.     smc_coherence_block(NORM_EXC, EXCEPTION_JUMP_SIZE);
  118.     memcpy(CACHE_EXC, (char *) cache_error_entry, EXCEPTION_JUMP_SIZE);
  119.     smc_coherence_block(CACHE_EXC, EXCEPTION_JUMP_SIZE);
  120.    
  121.     /*
  122.      * Switch to BEV normal level so that exception vectors point to the
  123.      * kernel. Clear the error level.
  124.      */
  125.     cp0_status_write(cp0_status_read() &
  126.         ~(cp0_status_bev_bootstrap_bit | cp0_status_erl_error_bit));
  127.    
  128.     /*
  129.      * Mask all interrupts
  130.      */
  131.     cp0_mask_all_int();
  132.    
  133.     debugger_init();
  134. }
  135.  
  136. void arch_post_mm_init(void)
  137. {
  138.     interrupt_init();
  139.    
  140. #ifdef CONFIG_FB
  141.     /* GXemul framebuffer */
  142.     fb_properties_t gxemul_prop = {
  143.         .addr = 0x12000000,
  144.         .offset = 0,
  145.         .x = 640,
  146.         .y = 480,
  147.         .scan = 1920,
  148.         .visual = VISUAL_BGR_8_8_8,
  149.     };
  150.     fb_init(&gxemul_prop);
  151. #else
  152. #ifdef CONFIG_MIPS_PRN
  153.     dsrlnout_init((ioport8_t *) MSIM_KBD_ADDRESS);
  154. #endif /* CONFIG_MIPS_PRN */
  155. #endif /* CONFIG_FB */
  156. }
  157.  
  158. void arch_post_cpu_init(void)
  159. {
  160. }
  161.  
  162. void arch_pre_smp_init(void)
  163. {
  164. }
  165.  
  166. void arch_post_smp_init(void)
  167. {
  168. #ifdef CONFIG_MIPS_KBD
  169.     devno_t devno = device_assign_devno();
  170.    
  171.     /*
  172.      * Initialize the msim/GXemul keyboard port. Then initialize the serial line
  173.      * module and connect it to the msim/GXemul keyboard. Enable keyboard interrupts.
  174.      */
  175.     indev_t *kbrdin = dsrlnin_init((dsrlnin_t *) MSIM_KBD_ADDRESS, devno, MSIM_KBD_IRQ);
  176.     if (kbrdin) {
  177.         srln_init(kbrdin);
  178.         cp0_unmask_int(MSIM_KBD_IRQ);
  179.     }
  180.    
  181.     /*
  182.      * This is the necessary evil until the userspace driver is entirely
  183.      * self-sufficient.
  184.      */
  185.     sysinfo_set_item_val("kbd", NULL, true);
  186.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  187.     sysinfo_set_item_val("kbd.inr", NULL, MSIM_KBD_IRQ);
  188.     sysinfo_set_item_val("kbd.address.virtual", NULL, MSIM_KBD_ADDRESS);
  189. #endif
  190. }
  191.  
  192. void calibrate_delay_loop(void)
  193. {
  194. }
  195.  
  196. void userspace(uspace_arg_t *kernel_uarg)
  197. {
  198.     /* EXL = 1, UM = 1, IE = 1 */
  199.     cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
  200.         cp0_status_um_bit | cp0_status_ie_enabled_bit));
  201.     cp0_epc_write((uintptr_t) kernel_uarg->uspace_entry);
  202.     userspace_asm(((uintptr_t) kernel_uarg->uspace_stack + PAGE_SIZE),
  203.         (uintptr_t) kernel_uarg->uspace_uarg,
  204.         (uintptr_t) kernel_uarg->uspace_entry);
  205.    
  206.     while (1);
  207. }
  208.  
  209. /** Perform mips32 specific tasks needed before the new task is run. */
  210. void before_task_runs_arch(void)
  211. {
  212. }
  213.  
  214. /** Perform mips32 specific tasks needed before the new thread is scheduled. */
  215. void before_thread_runs_arch(void)
  216. {
  217.     supervisor_sp = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE -
  218.         SP_DELTA];
  219. }
  220.  
  221. void after_thread_ran_arch(void)
  222. {
  223. }
  224.  
  225. /** Set thread-local-storage pointer
  226.  *
  227.  * We have it currently in K1, it is
  228.  * possible to have it separately in the future.
  229.  */
  230. unative_t sys_tls_set(unative_t addr)
  231. {
  232.     return 0;
  233. }
  234.  
  235. void arch_reboot(void)
  236. {
  237.     ___halt();
  238.     while (1);
  239. }
  240.  
  241. /** Construct function pointer
  242.  *
  243.  * @param fptr   function pointer structure
  244.  * @param addr   function address
  245.  * @param caller calling function address
  246.  *
  247.  * @return address of the function pointer
  248.  *
  249.  */
  250. void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
  251. {
  252.     return addr;
  253. }
  254.  
  255. /** @}
  256.  */
  257.