projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * arch/v850/kernel/rte_ma1_cb.c -- Midas labs RTE-V850E/MA1-CB board | |
| 3 | * | |
| 4 | * Copyright (C) 2001,02,03 NEC Electronics Corporation | |
| 5 | * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org> | |
| 6 | * | |
| 7 | * This file is subject to the terms and conditions of the GNU General | |
| 8 | * Public License. See the file COPYING in the main directory of this | |
| 9 | * archive for more details. | |
| 10 | * | |
| 11 | * Written by Miles Bader <miles@gnu.org> | |
| 12 | */ | |
| 13 | ||
| 1da177e4 LT |
14 | #include <linux/kernel.h> |
| 15 | #include <linux/init.h> | |
| 16 | #include <linux/bootmem.h> | |
| 17 | ||
| 18 | #include <asm/atomic.h> | |
| 19 | #include <asm/page.h> | |
| 20 | #include <asm/ma1.h> | |
| 21 | #include <asm/rte_ma1_cb.h> | |
| 22 | #include <asm/v850e_timer_c.h> | |
| 23 | ||
| 24 | #include "mach.h" | |
| 25 | ||
| 26 | ||
| 27 | /* SRAM and SDRAM are almost contiguous (with a small hole in between; | |
| 28 | see mach_reserve_bootmem for details), so just use both as one big area. */ | |
| 29 | #define RAM_START SRAM_ADDR | |
| 30 | #define RAM_END (SDRAM_ADDR + SDRAM_SIZE) | |
| 31 | ||
| 32 | ||
| 33 | void __init mach_early_init (void) | |
| 34 | { | |
| 35 | rte_cb_early_init (); | |
| 36 | } | |
| 37 | ||
| 38 | void __init mach_get_physical_ram (unsigned long *ram_start, | |
| 39 | unsigned long *ram_len) | |
| 40 | { | |
| 41 | *ram_start = RAM_START; | |
| 42 | *ram_len = RAM_END - RAM_START; | |
| 43 | } | |
| 44 | ||
| 45 | void __init mach_reserve_bootmem () | |
| 46 | { | |
| 47 | #ifdef CONFIG_RTE_CB_MULTI | |
| 48 | /* Prevent the kernel from touching the monitor's scratch RAM. */ | |
| 49 | reserve_bootmem (MON_SCRATCH_ADDR, MON_SCRATCH_SIZE); | |
| 50 | #endif | |
| 51 | ||
| 52 | /* The space between SRAM and SDRAM is filled with duplicate | |
| 53 | images of SRAM. Prevent the kernel from using them. */ | |
| 54 | reserve_bootmem (SRAM_ADDR + SRAM_SIZE, | |
| 55 | SDRAM_ADDR - (SRAM_ADDR + SRAM_SIZE)); | |
| 56 | } | |
| 57 | ||
| 58 | void mach_gettimeofday (struct timespec *tv) | |
| 59 | { | |
| 60 | tv->tv_sec = 0; | |
| 61 | tv->tv_nsec = 0; | |
| 62 | } | |
| 63 | ||
| 64 | /* Called before configuring an on-chip UART. */ | |
| 65 | void rte_ma1_cb_uart_pre_configure (unsigned chan, | |
| 66 | unsigned cflags, unsigned baud) | |
| 67 | { | |
| 68 | /* The RTE-MA1-CB connects some general-purpose I/O pins on the | |
| 69 | CPU to the RTS/CTS lines of UART 0's serial connection. | |
| 70 | I/O pins P42 and P43 are RTS and CTS respectively. */ | |
| 71 | if (chan == 0) { | |
| 72 | /* Put P42 & P43 in I/O port mode. */ | |
| 73 | MA_PORT4_PMC &= ~0xC; | |
| 74 | /* Make P42 an output, and P43 an input. */ | |
| 75 | MA_PORT4_PM = (MA_PORT4_PM & ~0xC) | 0x8; | |
| 76 | } | |
| 77 | ||
| 78 | /* Do pre-configuration for the actual UART. */ | |
| 79 | ma_uart_pre_configure (chan, cflags, baud); | |
| 80 | } | |
| 81 | ||
| 82 | void __init mach_init_irqs (void) | |
| 83 | { | |
| 84 | unsigned tc; | |
| 85 | ||
| 86 | /* Initialize interrupts. */ | |
| 87 | ma_init_irqs (); | |
| 88 | rte_cb_init_irqs (); | |
| 89 | ||
| 90 | /* Use falling-edge-sensitivity for interrupts . */ | |
| 91 | V850E_TIMER_C_SESC (0) &= ~0xC; | |
| 92 | V850E_TIMER_C_SESC (1) &= ~0xF; | |
| 93 | ||
| 94 | /* INTP000-INTP011 are shared with `Timer C', so we have to set | |
| 95 | up Timer C to pass them through as raw interrupts. */ | |
| 96 | for (tc = 0; tc < 2; tc++) | |
| 97 | /* Turn on the timer. */ | |
| 98 | V850E_TIMER_C_TMCC0 (tc) |= V850E_TIMER_C_TMCC0_CAE; | |
| 99 | ||
| 100 | /* Make sure the relevant port0/port1 pins are assigned | |
| 101 | interrupt duty. We used INTP001-INTP011 (don't screw with | |
| 102 | INTP000 because the monitor uses it). */ | |
| 103 | MA_PORT0_PMC |= 0x4; /* P02 (INTP001) in IRQ mode. */ | |
| 104 | MA_PORT1_PMC |= 0x6; /* P11 (INTP010) & P12 (INTP011) in IRQ mode.*/ | |
| 105 | } |