diff options
author | 2017-04-25 03:31:15 -0700 | |
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committer | 2017-05-22 06:48:08 +0000 | |
commit | bb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch) | |
tree | ca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/hw/nvram/eeprom93xx.c | |
parent | a14b48d18a9ed03ec191cf16b162206998a895ce (diff) |
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/hw/nvram/eeprom93xx.c')
-rw-r--r-- | qemu/hw/nvram/eeprom93xx.c | 337 |
1 files changed, 0 insertions, 337 deletions
diff --git a/qemu/hw/nvram/eeprom93xx.c b/qemu/hw/nvram/eeprom93xx.c deleted file mode 100644 index 2c16fc23d..000000000 --- a/qemu/hw/nvram/eeprom93xx.c +++ /dev/null @@ -1,337 +0,0 @@ -/* - * QEMU EEPROM 93xx emulation - * - * Copyright (c) 2006-2007 Stefan Weil - * - * 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; either version 2 of the License, or - * (at your option) any later version. - * - * 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, see <http://www.gnu.org/licenses/>. - */ - -/* Emulation for serial EEPROMs: - * NMC93C06 256-Bit (16 x 16) - * NMC93C46 1024-Bit (64 x 16) - * NMC93C56 2028 Bit (128 x 16) - * NMC93C66 4096 Bit (256 x 16) - * Compatible devices include FM93C46 and others. - * - * Other drivers use these interface functions: - * eeprom93xx_new - add a new EEPROM (with 16, 64 or 256 words) - * eeprom93xx_free - destroy EEPROM - * eeprom93xx_read - read data from the EEPROM - * eeprom93xx_write - write data to the EEPROM - * eeprom93xx_data - get EEPROM data array for external manipulation - * - * Todo list: - * - No emulation of EEPROM timings. - */ - -#include "qemu/osdep.h" -#include "hw/hw.h" -#include "hw/nvram/eeprom93xx.h" - -/* Debug EEPROM emulation. */ -//~ #define DEBUG_EEPROM - -#ifdef DEBUG_EEPROM -#define logout(fmt, ...) fprintf(stderr, "EEPROM\t%-24s" fmt, __func__, ## __VA_ARGS__) -#else -#define logout(fmt, ...) ((void)0) -#endif - -#define EEPROM_INSTANCE 0 -#define OLD_EEPROM_VERSION 20061112 -#define EEPROM_VERSION (OLD_EEPROM_VERSION + 1) - -#if 0 -typedef enum { - eeprom_read = 0x80, /* read register xx */ - eeprom_write = 0x40, /* write register xx */ - eeprom_erase = 0xc0, /* erase register xx */ - eeprom_ewen = 0x30, /* erase / write enable */ - eeprom_ewds = 0x00, /* erase / write disable */ - eeprom_eral = 0x20, /* erase all registers */ - eeprom_wral = 0x10, /* write all registers */ - eeprom_amask = 0x0f, - eeprom_imask = 0xf0 -} eeprom_instruction_t; -#endif - -#ifdef DEBUG_EEPROM -static const char *opstring[] = { - "extended", "write", "read", "erase" -}; -#endif - -struct _eeprom_t { - uint8_t tick; - uint8_t address; - uint8_t command; - uint8_t writable; - - uint8_t eecs; - uint8_t eesk; - uint8_t eedo; - - uint8_t addrbits; - uint16_t size; - uint16_t data; - uint16_t contents[0]; -}; - -/* Code for saving and restoring of EEPROM state. */ - -/* Restore an uint16_t from an uint8_t - This is a Big hack, but it is how the old state did it. - */ - -static int get_uint16_from_uint8(QEMUFile *f, void *pv, size_t size) -{ - uint16_t *v = pv; - *v = qemu_get_ubyte(f); - return 0; -} - -static void put_unused(QEMUFile *f, void *pv, size_t size) -{ - fprintf(stderr, "uint16_from_uint8 is used only for backwards compatibility.\n"); - fprintf(stderr, "Never should be used to write a new state.\n"); - exit(0); -} - -static const VMStateInfo vmstate_hack_uint16_from_uint8 = { - .name = "uint16_from_uint8", - .get = get_uint16_from_uint8, - .put = put_unused, -}; - -#define VMSTATE_UINT16_HACK_TEST(_f, _s, _t) \ - VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint16_from_uint8, uint16_t) - -static bool is_old_eeprom_version(void *opaque, int version_id) -{ - return version_id == OLD_EEPROM_VERSION; -} - -static const VMStateDescription vmstate_eeprom = { - .name = "eeprom", - .version_id = EEPROM_VERSION, - .minimum_version_id = OLD_EEPROM_VERSION, - .fields = (VMStateField[]) { - VMSTATE_UINT8(tick, eeprom_t), - VMSTATE_UINT8(address, eeprom_t), - VMSTATE_UINT8(command, eeprom_t), - VMSTATE_UINT8(writable, eeprom_t), - - VMSTATE_UINT8(eecs, eeprom_t), - VMSTATE_UINT8(eesk, eeprom_t), - VMSTATE_UINT8(eedo, eeprom_t), - - VMSTATE_UINT8(addrbits, eeprom_t), - VMSTATE_UINT16_HACK_TEST(size, eeprom_t, is_old_eeprom_version), - VMSTATE_UNUSED_TEST(is_old_eeprom_version, 1), - VMSTATE_UINT16_EQUAL_V(size, eeprom_t, EEPROM_VERSION), - VMSTATE_UINT16(data, eeprom_t), - VMSTATE_VARRAY_UINT16_UNSAFE(contents, eeprom_t, size, 0, - vmstate_info_uint16, uint16_t), - VMSTATE_END_OF_LIST() - } -}; - -void eeprom93xx_write(eeprom_t *eeprom, int eecs, int eesk, int eedi) -{ - uint8_t tick = eeprom->tick; - uint8_t eedo = eeprom->eedo; - uint16_t address = eeprom->address; - uint8_t command = eeprom->command; - - logout("CS=%u SK=%u DI=%u DO=%u, tick = %u\n", - eecs, eesk, eedi, eedo, tick); - - if (!eeprom->eecs && eecs) { - /* Start chip select cycle. */ - logout("Cycle start, waiting for 1st start bit (0)\n"); - tick = 0; - command = 0x0; - address = 0x0; - } else if (eeprom->eecs && !eecs) { - /* End chip select cycle. This triggers write / erase. */ - if (eeprom->writable) { - uint8_t subcommand = address >> (eeprom->addrbits - 2); - if (command == 0 && subcommand == 2) { - /* Erase all. */ - for (address = 0; address < eeprom->size; address++) { - eeprom->contents[address] = 0xffff; - } - } else if (command == 3) { - /* Erase word. */ - eeprom->contents[address] = 0xffff; - } else if (tick >= 2 + 2 + eeprom->addrbits + 16) { - if (command == 1) { - /* Write word. */ - eeprom->contents[address] &= eeprom->data; - } else if (command == 0 && subcommand == 1) { - /* Write all. */ - for (address = 0; address < eeprom->size; address++) { - eeprom->contents[address] &= eeprom->data; - } - } - } - } - /* Output DO is tristate, read results in 1. */ - eedo = 1; - } else if (eecs && !eeprom->eesk && eesk) { - /* Raising edge of clock shifts data in. */ - if (tick == 0) { - /* Wait for 1st start bit. */ - if (eedi == 0) { - logout("Got correct 1st start bit, waiting for 2nd start bit (1)\n"); - tick++; - } else { - logout("wrong 1st start bit (is 1, should be 0)\n"); - tick = 2; - //~ assert(!"wrong start bit"); - } - } else if (tick == 1) { - /* Wait for 2nd start bit. */ - if (eedi != 0) { - logout("Got correct 2nd start bit, getting command + address\n"); - tick++; - } else { - logout("1st start bit is longer than needed\n"); - } - } else if (tick < 2 + 2) { - /* Got 2 start bits, transfer 2 opcode bits. */ - tick++; - command <<= 1; - if (eedi) { - command += 1; - } - } else if (tick < 2 + 2 + eeprom->addrbits) { - /* Got 2 start bits and 2 opcode bits, transfer all address bits. */ - tick++; - address = ((address << 1) | eedi); - if (tick == 2 + 2 + eeprom->addrbits) { - logout("%s command, address = 0x%02x (value 0x%04x)\n", - opstring[command], address, eeprom->contents[address]); - if (command == 2) { - eedo = 0; - } - address = address % eeprom->size; - if (command == 0) { - /* Command code in upper 2 bits of address. */ - switch (address >> (eeprom->addrbits - 2)) { - case 0: - logout("write disable command\n"); - eeprom->writable = 0; - break; - case 1: - logout("write all command\n"); - break; - case 2: - logout("erase all command\n"); - break; - case 3: - logout("write enable command\n"); - eeprom->writable = 1; - break; - } - } else { - /* Read, write or erase word. */ - eeprom->data = eeprom->contents[address]; - } - } - } else if (tick < 2 + 2 + eeprom->addrbits + 16) { - /* Transfer 16 data bits. */ - tick++; - if (command == 2) { - /* Read word. */ - eedo = ((eeprom->data & 0x8000) != 0); - } - eeprom->data <<= 1; - eeprom->data += eedi; - } else { - logout("additional unneeded tick, not processed\n"); - } - } - /* Save status of EEPROM. */ - eeprom->tick = tick; - eeprom->eecs = eecs; - eeprom->eesk = eesk; - eeprom->eedo = eedo; - eeprom->address = address; - eeprom->command = command; -} - -uint16_t eeprom93xx_read(eeprom_t *eeprom) -{ - /* Return status of pin DO (0 or 1). */ - logout("CS=%u DO=%u\n", eeprom->eecs, eeprom->eedo); - return eeprom->eedo; -} - -#if 0 -void eeprom93xx_reset(eeprom_t *eeprom) -{ - /* prepare eeprom */ - logout("eeprom = 0x%p\n", eeprom); - eeprom->tick = 0; - eeprom->command = 0; -} -#endif - -eeprom_t *eeprom93xx_new(DeviceState *dev, uint16_t nwords) -{ - /* Add a new EEPROM (with 16, 64 or 256 words). */ - eeprom_t *eeprom; - uint8_t addrbits; - - switch (nwords) { - case 16: - case 64: - addrbits = 6; - break; - case 128: - case 256: - addrbits = 8; - break; - default: - assert(!"Unsupported EEPROM size, fallback to 64 words!"); - nwords = 64; - addrbits = 6; - } - - eeprom = (eeprom_t *)g_malloc0(sizeof(*eeprom) + nwords * 2); - eeprom->size = nwords; - eeprom->addrbits = addrbits; - /* Output DO is tristate, read results in 1. */ - eeprom->eedo = 1; - logout("eeprom = 0x%p, nwords = %u\n", eeprom, nwords); - vmstate_register(dev, 0, &vmstate_eeprom, eeprom); - return eeprom; -} - -void eeprom93xx_free(DeviceState *dev, eeprom_t *eeprom) -{ - /* Destroy EEPROM. */ - logout("eeprom = 0x%p\n", eeprom); - vmstate_unregister(dev, &vmstate_eeprom, eeprom); - g_free(eeprom); -} - -uint16_t *eeprom93xx_data(eeprom_t *eeprom) -{ - /* Get EEPROM data array. */ - return &eeprom->contents[0]; -} - -/* eof */ |