0,0 → 1,119 |
/* |
* Copyright (c) 2006 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
/** @addtogroup sparc64 |
* @{ |
*/ |
/** |
* @file |
* @brief FireHose Controller (FHC) driver. |
* |
* Note that this driver is a result of reverse engineering |
* rather than implementation of a specification. This |
* is due to the fact that the FHC documentation is not |
* publicly available. |
*/ |
|
#include <arch/drivers/fhc.h> |
#include <arch/trap/interrupt.h> |
#include <mm/page.h> |
#include <mm/slab.h> |
#include <arch/types.h> |
#include <genarch/ofw/ofw_tree.h> |
|
fhc_t *central_fhc = NULL; |
|
/** |
* I suspect this must be hardcoded in the FHC. |
* If it is not, than we can read all IMAP registers |
* and get the complete mapping. |
*/ |
#define FHC_UART_INR 0x39 |
|
#define FHC_UART_IMAP 0x0 |
#define FHC_UART_ICLR 0x4 |
|
#define UART_IMAP_REG 4 |
|
fhc_t *fhc_init(ofw_tree_node_t *node) |
{ |
fhc_t *fhc; |
ofw_tree_property_t *prop; |
|
prop = ofw_tree_getprop(node, "reg"); |
|
if (!prop || !prop->value) |
return NULL; |
|
count_t regs = prop->size / sizeof(ofw_central_reg_t); |
if (regs + 1 < UART_IMAP_REG) |
return NULL; |
|
ofw_central_reg_t *reg = &((ofw_central_reg_t *) prop->value)[UART_IMAP_REG]; |
|
uintptr_t paddr; |
if (!ofw_central_apply_ranges(node->parent, reg, &paddr)) |
return NULL; |
|
fhc = (fhc_t *) malloc(sizeof(fhc_t), FRAME_ATOMIC); |
if (!fhc) |
return NULL; |
|
fhc->uart_imap = (uint32_t *) hw_map(paddr, reg->size); |
|
return fhc; |
} |
|
void fhc_enable_interrupt(fhc_t *fhc, int inr) |
{ |
switch (inr) { |
case FHC_UART_INR: |
fhc->uart_imap[FHC_UART_IMAP] |= IMAP_V_MASK; |
break; |
default: |
panic("Unexpected INR (%d)\n", inr); |
break; |
} |
} |
|
void fhc_clear_interrupt(fhc_t *fhc, int inr) |
{ |
ASSERT(fhc->uart_imap); |
|
switch (inr) { |
case FHC_UART_INR: |
fhc->uart_imap[FHC_UART_ICLR] = 0; |
break; |
default: |
panic("Unexpected INR (%d)\n", inr); |
break; |
} |
} |
|
/** @} |
*/ |