1 /* 2 * QEMU M48T59 and M48T08 NVRAM emulation (common header) 3 * 4 * Copyright (c) 2003-2005, 2007 Jocelyn Mayer 5 * Copyright (c) 2013 Hervé Poussineau 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 #ifndef HW_M48T59_INTERNAL_H 27 #define HW_M48T59_INTERNAL_H 28 29 #define M48T59_DEBUG 0 30 31 #define NVRAM_PRINTF(fmt, ...) do { \ 32 if (M48T59_DEBUG) { printf(fmt , ## __VA_ARGS__); } } while (0) 33 34 /* 35 * The M48T02, M48T08 and M48T59 chips are very similar. The newer '59 has 36 * alarm and a watchdog timer and related control registers. In the 37 * PPC platform there is also a nvram lock function. 38 */ 39 40 typedef struct M48txxInfo { 41 const char *bus_name; 42 uint32_t model; /* 2 = m48t02, 8 = m48t08, 59 = m48t59 */ 43 uint32_t size; 44 } M48txxInfo; 45 46 typedef struct M48t59State { 47 /* Hardware parameters */ 48 qemu_irq IRQ; 49 MemoryRegion iomem; 50 uint32_t size; 51 int32_t base_year; 52 /* RTC management */ 53 time_t time_offset; 54 time_t stop_time; 55 /* Alarm & watchdog */ 56 struct tm alarm; 57 QEMUTimer *alrm_timer; 58 QEMUTimer *wd_timer; 59 /* NVRAM storage */ 60 uint8_t *buffer; 61 /* Model parameters */ 62 uint32_t model; /* 2 = m48t02, 8 = m48t08, 59 = m48t59 */ 63 /* NVRAM storage */ 64 uint16_t addr; 65 uint8_t lock; 66 } M48t59State; 67 68 uint32_t m48t59_read(M48t59State *NVRAM, uint32_t addr); 69 void m48t59_write(M48t59State *NVRAM, uint32_t addr, uint32_t val); 70 void m48t59_reset_common(M48t59State *NVRAM); 71 void m48t59_realize_common(M48t59State *s, Error **errp); 72 73 static inline void m48t59_toggle_lock(M48t59State *NVRAM, int lock) 74 { 75 NVRAM->lock ^= 1 << lock; 76 } 77 78 extern const MemoryRegionOps m48t59_io_ops; 79 80 #endif /* HW_M48T59_INTERNAL_H */ 81