| /* |
| * Copyright (C) 2010 Magnus Damm |
| * Copyright (C) 2008 Renesas Solutions Corp. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #include <mach/irqs.h> |
| |
| #define INTCA_BASE 0xe6980000 |
| #define INTFLGA_OFFS 0x00000018 /* accept pending interrupt */ |
| #define INTEVTA_OFFS 0x00000020 /* vector number of accepted interrupt */ |
| #define INTLVLA_OFFS 0x00000030 /* priority level of accepted interrupt */ |
| #define INTLVLB_OFFS 0x00000034 /* previous priority level */ |
| |
| .macro disable_fiq |
| .endm |
| |
| .macro get_irqnr_preamble, base, tmp |
| ldr \base, =INTCA_BASE |
| .endm |
| |
| .macro arch_ret_to_user, tmp1, tmp2 |
| .endm |
| |
| .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| /* The single INTFLGA read access below results in the following: |
| * |
| * 1. INTLVLB is updated with old priority value from INTLVLA |
| * 2. Highest priority interrupt is accepted |
| * 3. INTLVLA is updated to contain priority of accepted interrupt |
| * 4. Accepted interrupt vector is stored in INTFLGA and INTEVTA |
| */ |
| ldr \irqnr, [\base, #INTFLGA_OFFS] |
| |
| /* Restore INTLVLA with the value saved in INTLVLB. |
| * This is required to support interrupt priorities properly. |
| */ |
| ldrb \tmp, [\base, #INTLVLB_OFFS] |
| strb \tmp, [\base, #INTLVLA_OFFS] |
| |
| /* Handle invalid vector number case */ |
| cmp \irqnr, #0 |
| beq 1000f |
| |
| /* Convert vector to irq number, same as the evt2irq() macro */ |
| lsr \irqnr, \irqnr, #0x5 |
| subs \irqnr, \irqnr, #16 |
| |
| 1000: |
| .endm |
