| 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; |
| } |
| } |
| |
| /** @} |
| */ |