Root/
| 1 | #pypp 0 |
| 2 | // vim: set filetype=cpp :// |
| 3 | // Iris: micro-kernel for a capability-based operating system. |
| 4 | // mips/nanonote/board.ccp: nanonote-specific definitions. |
| 5 | // Copyright 2009 Bas Wijnen <wijnen@debian.org> |
| 6 | // |
| 7 | // This program is free software: you can redistribute it and/or modify |
| 8 | // it under the terms of the GNU General Public License as published by |
| 9 | // the Free Software Foundation, either version 3 of the License, or |
| 10 | // (at your option) any later version. |
| 11 | // |
| 12 | // This program is distributed in the hope that it will be useful, |
| 13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | // GNU General Public License for more details. |
| 16 | // |
| 17 | // You should have received a copy of the GNU General Public License |
| 18 | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 19 | |
| 20 | #define ARCH |
| 21 | #define INIT |
| 22 | #include "kernel.hh" |
| 23 | |
| 24 | void board_init (): |
| 25 | pll_init () |
| 26 | // Stop all clocks, except the RTC and timer interrupt source. |
| 27 | CPM_CLKGR = 0x7fff & ~(CPM_CLKGR_RTC | CPM_CLKGR_TCU) |
| 28 | // Make sure the rtc is able to boot the device. |
| 29 | while !rtc_write_ready (): |
| 30 | rtc_enabled () |
| 31 | while !rtc_write_ready (): |
| 32 | // Set wakeup assertion time, so it actually wakes up. |
| 33 | rtc_set_hrcr_val (0xfe0) |
| 34 | while !rtc_write_ready (): |
| 35 | // Set glitch detection to a low value. |
| 36 | rtc_set_hwfcr_val (0x1e0) |
| 37 | while !rtc_write_ready (): |
| 38 | // Allow rtc alarm to wake up device. |
| 39 | rtc_enable_alarm_wakeup () |
| 40 | while !rtc_write_ready (): |
| 41 | // sdram memory. |
| 42 | gpio_as_sdram_16bit () |
| 43 | // flash memory. |
| 44 | gpio_as_nand () |
| 45 | // sound controller. |
| 46 | gpio_as_aic () |
| 47 | // micro-sd controller. |
| 48 | gpio_as_msc () |
| 49 | // display. |
| 50 | gpio_as_lcd_16bit () |
| 51 | // buzzer. |
| 52 | gpio_as_pwm4 () |
| 53 | // Set up memory. |
| 54 | setup_sdram () |
| 55 | // Use some gpio pins for lcd. |
| 56 | gpio_as_gpio (2, (1 << 21) | (1 << 22) | (1 << 23)) |
| 57 | gpio_as_output (2, (1 << 21) | (1 << 22) | (1 << 23)) |
| 58 | // And some for sd/mmc. |
| 59 | gpio_as_gpio (3, (1 << 0) | (1 << 2)) |
| 60 | gpio_as_output (3, 1 << 2) |
| 61 | gpio_as_input (3, 1 << 0) |
| 62 | gpio_disable_pull (3, (1 << 0) | (1 << 2)) |
| 63 | // Disable power to sd/mmc by default. |
| 64 | gpio_set (3, 1 << 2) |
| 65 | // Set up timed interrupts. |
| 66 | tcu_start_timer_clock (0) |
| 67 | tcu_stop_counter (0) |
| 68 | tcu_select_extalclk (0) |
| 69 | tcu_select_clk_div4 (0) |
| 70 | tcu_disable_pwm_output (0) |
| 71 | tcu_set_full_data (0, JZ_EXTAL / HZ / 4) |
| 72 | tcu_mask_half_match_irq (0) |
| 73 | tcu_clear_full_match_flag (0) |
| 74 | tcu_unmask_full_match_irq (0) |
| 75 | tcu_start_counter (0) |
| 76 | #ifndef NDEBUG |
| 77 | setup_uart (true) |
| 78 | kdebug ("\n\nSerial port initialized\n") |
| 79 | #endif |
| 80 | |
| 81 | static void sync_serial (): |
| 82 | #ifndef NDEBUG |
| 83 | // Wait for serial port to be done. |
| 84 | while !(UART0_LSR & UARTLSR_TEMT): |
| 85 | #endif |
| 86 | |
| 87 | void arch_reboot (): |
| 88 | sync_serial () |
| 89 | // Reboot. |
| 90 | wdt_select_extalclk () |
| 91 | wdt_select_clk_div1 () |
| 92 | wdt_set_data (1) |
| 93 | wdt_set_count (0) |
| 94 | wdt_start () |
| 95 | // Wait for wdt to trigger reboot. |
| 96 | while true: |
| 97 | |
| 98 | void arch_poweroff (): |
| 99 | // Make sure the rtc is running; it wakes the device up. |
| 100 | cpm_start_rtc () |
| 101 | while !rtc_write_ready (): |
| 102 | rtc_enabled () |
| 103 | while !rtc_write_ready (): |
| 104 | rtc_set_hwfcr_val (0x1e0) |
| 105 | while !rtc_write_ready (): |
| 106 | rtc_set_hrcr_val (0x7f) |
| 107 | while !rtc_write_ready (): |
| 108 | kdebug ("Power down.\n") |
| 109 | sync_serial () |
| 110 | rtc_power_down () |
| 111 | // Wait for power down to work. |
| 112 | while true: |
| 113 | asm ("wait") |
| 114 | |
| 115 | void arch_suspend (): |
| 116 | sync_serial () |
| 117 | // Suspend the system: go into SLEEP mode. |
| 118 | cpm_sleep_mode () |
| 119 | asm ("wait") |
| 120 | cpm_idle_mode () |
| 121 | |
| 122 | // Boot into another kernel. |
| 123 | void arch_boot (unsigned address, unsigned arg): |
| 124 | sync_serial () |
| 125 | arch_flush_cache () |
| 126 | ((void (*)(unsigned))address) (arg) |
| 127 |
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