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  1. /*
  2.  * Copyright (c) 2008 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. /**
  33.  * @file
  34.  * @brief   Driver for the UPA to PCI bridge (Psycho).
  35.  */
  36.  
  37. #include <arch/drivers/psycho.h>
  38. #include <arch/trap/interrupt.h>
  39. #include <mm/page.h>
  40. #include <mm/slab.h>
  41. #include <arch/types.h>
  42. #include <genarch/ofw/ofw_tree.h>
  43. #include <byteorder.h>
  44.  
  45. #define PSYCHO_INTERNAL_REG 2
  46.  
  47. #define PSYCHO_OBIO_IMR_BASE    (0x1000 / sizeof(uint64_t))
  48. #define PSYCHO_OBIO_IMR(ino)    (PSYCHO_OBIO_IMR_BASE + ((ino) & INO_MASK))
  49.  
  50. #define PSYCHO_OBIO_CIR_BASE    (0x1800 / sizeof(uint64_t))
  51. #define PSYCHO_OBIO_CIR(ino)    (PSYCHO_OBIO_CIR_BASE + ((ino) & INO_MASK))
  52.  
  53. psycho_t *psycho_a = NULL;
  54. psycho_t *psycho_b = NULL;
  55.  
  56. psycho_t *psycho_init(ofw_tree_node_t *node)
  57. {
  58.     psycho_t *psycho;
  59.     ofw_tree_property_t *prop;
  60.  
  61.     prop = ofw_tree_getprop(node, "reg");
  62.    
  63.     if (!prop || !prop->value)
  64.         return NULL;
  65.    
  66.     count_t regs = prop->size / sizeof(ofw_upa_reg_t);
  67.     if (regs < PSYCHO_INTERNAL_REG + 1)
  68.         return NULL;
  69.        
  70.     ofw_upa_reg_t *reg =
  71.         &((ofw_upa_reg_t *) prop->value)[PSYCHO_INTERNAL_REG];
  72.  
  73.     uintptr_t paddr;
  74.     if (!ofw_upa_apply_ranges(node->parent, reg, &paddr))
  75.         return NULL;
  76.  
  77.     psycho = (psycho_t *) malloc(sizeof(psycho_t), FRAME_ATOMIC);
  78.     if (!psycho)
  79.         return NULL;
  80.  
  81.     psycho->regs = (uint64_t *) hw_map(paddr, reg->size);
  82.    
  83.     return psycho;
  84. }
  85.  
  86. void psycho_enable_interrupt(psycho_t *psycho, int inr)
  87. {
  88.     int ino = inr & ~IGN_MASK;
  89.     uint64_t imr = psycho->regs[PSYCHO_OBIO_IMR(ino)];
  90.     imr |= host2uint64_t_le(IMAP_V_MASK);
  91.     psycho->regs[PSYCHO_OBIO_IMR(ino)] = imr;
  92. }
  93.  
  94. void psycho_clear_interrupt(psycho_t *psycho, int inr)
  95. {
  96.     int ino = inr & ~IGN_MASK;
  97.     uint64_t idle = host2uint64_t_le(0);
  98.     psycho->regs[PSYCHO_OBIO_CIR(ino)] = idle;
  99. }
  100.  
  101. /** @}
  102.  */
  103.