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  1. /*
  2.  * Copyright (C) 2005 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 sparc64
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_sparc64_ASM_H_
  36. #define KERN_sparc64_ASM_H_
  37.  
  38. #include <typedefs.h>
  39. #include <arch/types.h>
  40. #include <arch/register.h>
  41. #include <config.h>
  42.  
  43. /** Read Processor State register.
  44.  *
  45.  * @return Value of PSTATE register.
  46.  */
  47. static inline uint64_t pstate_read(void)
  48. {
  49.     uint64_t v;
  50.    
  51.     __asm__ volatile ("rdpr %%pstate, %0\n" : "=r" (v));
  52.    
  53.     return v;
  54. }
  55.  
  56. /** Write Processor State register.
  57.  *
  58.  * @param v New value of PSTATE register.
  59.  */
  60. static inline void pstate_write(uint64_t v)
  61. {
  62.     __asm__ volatile ("wrpr %0, %1, %%pstate\n" : : "r" (v), "i" (0));
  63. }
  64.  
  65. /** Read TICK_compare Register.
  66.  *
  67.  * @return Value of TICK_comapre register.
  68.  */
  69. static inline uint64_t tick_compare_read(void)
  70. {
  71.     uint64_t v;
  72.    
  73.     __asm__ volatile ("rd %%tick_cmpr, %0\n" : "=r" (v));
  74.    
  75.     return v;
  76. }
  77.  
  78. /** Write TICK_compare Register.
  79.  *
  80.  * @param v New value of TICK_comapre register.
  81.  */
  82. static inline void tick_compare_write(uint64_t v)
  83. {
  84.     __asm__ volatile ("wr %0, %1, %%tick_cmpr\n" : : "r" (v), "i" (0));
  85. }
  86.  
  87. /** Read TICK Register.
  88.  *
  89.  * @return Value of TICK register.
  90.  */
  91. static inline uint64_t tick_read(void)
  92. {
  93.     uint64_t v;
  94.    
  95.     __asm__ volatile ("rdpr %%tick, %0\n" : "=r" (v));
  96.    
  97.     return v;
  98. }
  99.  
  100. /** Write TICK Register.
  101.  *
  102.  * @param v New value of TICK register.
  103.  */
  104. static inline void tick_write(uint64_t v)
  105. {
  106.     __asm__ volatile ("wrpr %0, %1, %%tick\n" : : "r" (v), "i" (0));
  107. }
  108.  
  109. /** Read SOFTINT Register.
  110.  *
  111.  * @return Value of SOFTINT register.
  112.  */
  113. static inline uint64_t softint_read(void)
  114. {
  115.     uint64_t v;
  116.  
  117.     __asm__ volatile ("rd %%softint, %0\n" : "=r" (v));
  118.  
  119.     return v;
  120. }
  121.  
  122. /** Write SOFTINT Register.
  123.  *
  124.  * @param v New value of SOFTINT register.
  125.  */
  126. static inline void softint_write(uint64_t v)
  127. {
  128.     __asm__ volatile ("wr %0, %1, %%softint\n" : : "r" (v), "i" (0));
  129. }
  130.  
  131. /** Write CLEAR_SOFTINT Register.
  132.  *
  133.  * Bits set in CLEAR_SOFTINT register will be cleared in SOFTINT register.
  134.  *
  135.  * @param v New value of CLEAR_SOFTINT register.
  136.  */
  137. static inline void clear_softint_write(uint64_t v)
  138. {
  139.     __asm__ volatile ("wr %0, %1, %%clear_softint\n" : : "r" (v), "i" (0));
  140. }
  141.  
  142. /** Write SET_SOFTINT Register.
  143.  *
  144.  * Bits set in SET_SOFTINT register will be set in SOFTINT register.
  145.  *
  146.  * @param v New value of SET_SOFTINT register.
  147.  */
  148. static inline void set_softint_write(uint64_t v)
  149. {
  150.     __asm__ volatile ("wr %0, %1, %%set_softint\n" : : "r" (v), "i" (0));
  151. }
  152.  
  153. /** Enable interrupts.
  154.  *
  155.  * Enable interrupts and return previous
  156.  * value of IPL.
  157.  *
  158.  * @return Old interrupt priority level.
  159.  */
  160. static inline ipl_t interrupts_enable(void) {
  161.     pstate_reg_t pstate;
  162.     uint64_t value;
  163.    
  164.     value = pstate_read();
  165.     pstate.value = value;
  166.     pstate.ie = true;
  167.     pstate_write(pstate.value);
  168.    
  169.     return (ipl_t) value;
  170. }
  171.  
  172. /** Disable interrupts.
  173.  *
  174.  * Disable interrupts and return previous
  175.  * value of IPL.
  176.  *
  177.  * @return Old interrupt priority level.
  178.  */
  179. static inline ipl_t interrupts_disable(void) {
  180.     pstate_reg_t pstate;
  181.     uint64_t value;
  182.    
  183.     value = pstate_read();
  184.     pstate.value = value;
  185.     pstate.ie = false;
  186.     pstate_write(pstate.value);
  187.    
  188.     return (ipl_t) value;
  189. }
  190.  
  191. /** Restore interrupt priority level.
  192.  *
  193.  * Restore IPL.
  194.  *
  195.  * @param ipl Saved interrupt priority level.
  196.  */
  197. static inline void interrupts_restore(ipl_t ipl) {
  198.     pstate_reg_t pstate;
  199.    
  200.     pstate.value = pstate_read();
  201.     pstate.ie = ((pstate_reg_t) ipl).ie;
  202.     pstate_write(pstate.value);
  203. }
  204.  
  205. /** Return interrupt priority level.
  206.  *
  207.  * Return IPL.
  208.  *
  209.  * @return Current interrupt priority level.
  210.  */
  211. static inline ipl_t interrupts_read(void) {
  212.     return (ipl_t) pstate_read();
  213. }
  214.  
  215. /** Return base address of current stack.
  216.  *
  217.  * Return the base address of the current stack.
  218.  * The stack is assumed to be STACK_SIZE bytes long.
  219.  * The stack must start on page boundary.
  220.  */
  221. static inline uintptr_t get_stack_base(void)
  222. {
  223.     uintptr_t v;
  224.    
  225.     __asm__ volatile ("and %%sp, %1, %0\n" : "=r" (v) : "r" (~(STACK_SIZE-1)));
  226.    
  227.     return v;
  228. }
  229.  
  230. /** Read Version Register.
  231.  *
  232.  * @return Value of VER register.
  233.  */
  234. static inline uint64_t ver_read(void)
  235. {
  236.     uint64_t v;
  237.    
  238.     __asm__ volatile ("rdpr %%ver, %0\n" : "=r" (v));
  239.    
  240.     return v;
  241. }
  242.  
  243. /** Read Trap Base Address register.
  244.  *
  245.  * @return Current value in TBA.
  246.  */
  247. static inline uint64_t tba_read(void)
  248. {
  249.     uint64_t v;
  250.    
  251.     __asm__ volatile ("rdpr %%tba, %0\n" : "=r" (v));
  252.    
  253.     return v;
  254. }
  255.  
  256. /** Read Trap Program Counter register.
  257.  *
  258.  * @return Current value in TPC.
  259.  */
  260. static inline uint64_t tpc_read(void)
  261. {
  262.     uint64_t v;
  263.    
  264.     __asm__ volatile ("rdpr %%tpc, %0\n" : "=r" (v));
  265.    
  266.     return v;
  267. }
  268.  
  269. /** Read Trap Level register.
  270.  *
  271.  * @return Current value in TL.
  272.  */
  273. static inline uint64_t tl_read(void)
  274. {
  275.     uint64_t v;
  276.    
  277.     __asm__ volatile ("rdpr %%tl, %0\n" : "=r" (v));
  278.    
  279.     return v;
  280. }
  281.  
  282. /** Write Trap Base Address register.
  283.  *
  284.  * @param v New value of TBA.
  285.  */
  286. static inline void tba_write(uint64_t v)
  287. {
  288.     __asm__ volatile ("wrpr %0, %1, %%tba\n" : : "r" (v), "i" (0));
  289. }
  290.  
  291. /** Load uint64_t from alternate space.
  292.  *
  293.  * @param asi ASI determining the alternate space.
  294.  * @param va Virtual address within the ASI.
  295.  *
  296.  * @return Value read from the virtual address in the specified address space.
  297.  */
  298. static inline uint64_t asi_u64_read(asi_t asi, uintptr_t va)
  299. {
  300.     uint64_t v;
  301.    
  302.     __asm__ volatile ("ldxa [%1] %2, %0\n" : "=r" (v) : "r" (va), "i" (asi));
  303.    
  304.     return v;
  305. }
  306.  
  307. /** Store uint64_t to alternate space.
  308.  *
  309.  * @param asi ASI determining the alternate space.
  310.  * @param va Virtual address within the ASI.
  311.  * @param v Value to be written.
  312.  */
  313. static inline void asi_u64_write(asi_t asi, uintptr_t va, uint64_t v)
  314. {
  315.     __asm__ volatile ("stxa %0, [%1] %2\n" : :  "r" (v), "r" (va), "i" (asi) : "memory");
  316. }
  317.  
  318. /** Flush all valid register windows to memory. */
  319. static inline void flushw(void)
  320. {
  321.     __asm__ volatile ("flushw\n");
  322. }
  323.  
  324. /** Switch to nucleus by setting TL to 1. */
  325. static inline void nucleus_enter(void)
  326. {
  327.     __asm__ volatile ("wrpr %g0, 1, %tl\n");
  328. }
  329.  
  330. /** Switch from nucleus by setting TL to 0. */
  331. static inline void nucleus_leave(void)
  332. {
  333.     __asm__ volatile ("wrpr %g0, %g0, %tl\n");
  334. }
  335.  
  336. extern void cpu_halt(void);
  337. extern void cpu_sleep(void);
  338. extern void asm_delay_loop(uint32_t t);
  339.  
  340. extern uint64_t read_from_ag_g7(void);
  341. extern void write_to_ag_g6(uint64_t val);
  342. extern void write_to_ag_g7(uint64_t val);
  343. extern void write_to_ig_g6(uint64_t val);
  344.  
  345. extern void switch_to_userspace(uint64_t pc, uint64_t sp, uint64_t uarg);
  346.  
  347. #endif
  348.  
  349. /** @}
  350.  */
  351.