| /* 3b2_cpu.h: AT&T 3B2 Model 400 IO dispatch (Header) | |
| Copyright (c) 2017, Seth J. Morabito | |
| Permission is hereby granted, free of charge, to any person | |
| obtaining a copy of this software and associated documentation | |
| files (the "Software"), to deal in the Software without | |
| restriction, including without limitation the rights to use, copy, | |
| modify, merge, publish, distribute, sublicense, and/or sell copies | |
| of the Software, and to permit persons to whom the Software is | |
| furnished to do so, subject to the following conditions: | |
| The above copyright notice and this permission notice shall be | |
| included in all copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
| BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
| ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
| CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
| SOFTWARE. | |
| Except as contained in this notice, the name of the author shall | |
| not be used in advertising or otherwise to promote the sale, use or | |
| other dealings in this Software without prior written authorization | |
| from the author. | |
| */ | |
| /* Reference Documentation | |
| * ======================= | |
| * | |
| * All communication between the system board and feature cards is | |
| * done through in-memory queues, and causing interrupts in the | |
| * feature card by accessing the Control or ID/VEC memory-mapped IO | |
| * addresses. The structure of these queues is defined below in | |
| * tables. | |
| * | |
| * Sysgen Block | |
| * ------------ | |
| * | |
| * Pointed to by address at 0x2000000 after an INT0/INT1 combo | |
| * | |
| * | |
| * | Address | Size | Contents | | |
| * +---------------+------+-----------------------------------------+ | |
| * | SYSGEN_P | 4 | Address of request queue | | |
| * | SYSGEN_P + 4 | 4 | Address of completion queue | | |
| * | SYSGEN_P + 8 | 1 | Number of entries in request queue | | |
| * | SYSGEN_P + 9 | 1 | Number of entries in completion queue | | |
| * | SYSGEN_P + 10 | 1 | Interrupt Vector number | | |
| * | SYSGEN_P + 11 | 1 | Number of request queues | | |
| * | |
| * | |
| * Queue Entry | |
| * ----------- | |
| * | |
| * Each queue has one Express Entry, and n regular entries. | |
| * | |
| * | Address | Size | Contents | | |
| * +---------------+------+-----------------------------------------+ | |
| * | ENTRY_P | 2 | Byte Count | | |
| * | ENTRY_P + 2 | 1 | Subdevice [1] | | |
| * | ENTRY_P + 3 | 1 | Opcode | | |
| * | ENTRY_P + 4 | 4 | Address / Data | | |
| * | ENTRY_P + 8 | 4 | Application Specific Data | | |
| * | |
| * [1] The "Subdevice" entry is further divided into a bitset: | |
| * Bit 7: Command (1) / Status (0) | |
| * Bit 6: Sequence Bit | |
| * Bit 5-1: Subdevice | |
| * | |
| * | |
| * Queue | |
| * ----- | |
| * | |
| * The Queue structures (one for request, one for completion) hold: | |
| * - An express entry | |
| * - A set of pointers for load and unload from the queue | |
| * - Zero or more Queue Entries | |
| * | |
| * | Address | Size | Contents | | |
| * +---------------+------+-----------------------------------------+ | |
| * | QUEUE_P | 12 | Express Queue Entry [1] | | |
| * | QUEUE_P + 12 | 2 | Load Pointer | | |
| * | QUEUE_P + 14 | 2 | Unload Pointer | | |
| * | QUEUE_P + 16 | 12 | Entry 0 [1] | | |
| * | QUEUE_P + 28 | 12 | Entry 1 [1] | | |
| * | ... | ... | ... | | |
| * | |
| * [1] See Queue Entry above | |
| */ | |
| #ifndef _3B2_IO_H_ | |
| #define _3B2_IO_H_ | |
| #include "3b2_sysdev.h" | |
| #include "3b2_iu.h" | |
| #include "3b2_if.h" | |
| #include "3b2_id.h" | |
| #include "3b2_dmac.h" | |
| #include "3b2_mmu.h" | |
| #include "sim_tmxr.h" | |
| #define IOF_ID 0 | |
| #define IOF_VEC 1 | |
| #define IOF_CTRL 3 | |
| #define IOF_STAT 5 | |
| #define SYSGEN_PTR PHYS_MEM_BASE | |
| #define CIO_LOAD_SIZE 0x4 | |
| #define CIO_ENTRY_SIZE 0x0c | |
| #define CIO_QUE_OFFSET 0x10 | |
| #define CIO_SLOTS 12 | |
| /* CIO opcodes */ | |
| #define CIO_DLM 1 | |
| #define CIO_ULM 2 | |
| #define CIO_FCF 3 | |
| #define CIO_DOS 4 | |
| #define CIO_DSD 5 | |
| /* Map a physical address to a card ID */ | |
| #define CID(pa) (((((pa) >> 0x14) & 0x1f) / 2) - 1) | |
| /* Map a card ID to a base address */ | |
| #define CADDR(bid) (((((bid) + 1) * 2) << 0x14)) | |
| #define CIO_INT0 0x1 | |
| #define CIO_INT1 0x2 | |
| /* Offsets into the request/completion queues of various values */ | |
| #define LOAD_OFFSET 12 | |
| #define ULOAD_OFFSET 14 | |
| #define QUE_OFFSET 16 | |
| #define QUE_E_SIZE 12 | |
| #define CIO_SYGEN_MASK 0x3 | |
| typedef struct { | |
| uint16 id; /* Card ID */ | |
| void (*exp_handler)(uint8 cid); /* Handler for express jobs */ | |
| void (*full_handler)(uint8 cid); /* Handler for full jobs */ | |
| void (*sysgen)(uint8 cid); /* Sysgen routine (optional) */ | |
| uint32 rqp; /* Request Queue Pointer */ | |
| uint32 cqp; /* Completion Queue Pointer */ | |
| uint8 rqs; /* Request queue size */ | |
| uint8 cqs; /* Completion queue size */ | |
| uint8 ivec; /* Interrupt Vector */ | |
| uint8 no_rque; /* Number of request queues */ | |
| uint8 ipl; /* IPL that this card uses */ | |
| t_bool intr; /* Card needs to interrupt */ | |
| uint8 cmdbits; /* Commands received since RESET */ | |
| uint8 seqbit; /* Squence Bit */ | |
| uint8 op; /* Last received opcode */ | |
| TMLN *lines[4]; /* Terminal Multiplexer lines */ | |
| } CIO_STATE; | |
| typedef struct { | |
| uint16 byte_count; | |
| uint8 subdevice; | |
| uint8 opcode; | |
| uint32 address; | |
| uint32 app_data; | |
| } cio_entry; | |
| struct iolink { | |
| uint32 low; | |
| uint32 high; | |
| uint32 (*read)(uint32 pa, size_t size); | |
| void (*write)(uint32 pa, uint32 val, size_t size); | |
| }; | |
| /* Example pump structure | |
| * ---------------------- | |
| * | |
| * Used during initial setup of PORTS card in slot 0: | |
| * | |
| * dev = 0100 | |
| * min = 0000 | |
| * cmdcode = 0003 | |
| * options = 0000 | |
| * bufaddr = 808821A0 | |
| * ioaddr = 00000500 | |
| * size = 00000650 | |
| * numbrd = 00000000 | |
| * retcode = 00000008 (PU_NULL) | |
| */ | |
| typedef struct { | |
| uint16 dev; | |
| uint16 min; | |
| uint16 cmdcode; | |
| uint16 options; | |
| uint32 bufaddr; | |
| uint32 ioaddr; | |
| uint32 size; | |
| uint32 numbrd; | |
| uint32 retcode; | |
| } pump; | |
| extern uint16 cio_ints; | |
| extern CIO_STATE cio[CIO_SLOTS]; | |
| t_stat cio_reset(DEVICE *dptr); | |
| t_stat cio_svc(UNIT *uptr); | |
| /* Put an entry into the Completion Queue's Express entry */ | |
| void cio_cexpress(uint8 cid, cio_entry *cqe); | |
| /* Put an entry into the Completion Queue */ | |
| void cio_cqueue(uint8 cid, cio_entry *cqe); | |
| /* Get an entry from the Request Queue */ | |
| void cio_rqueue(uint8 cid, cio_entry *cqe); | |
| /* Perform a Sysgen */ | |
| void cio_sysgen(uint8 cid); | |
| /* Debugging only */ | |
| void dump_entry(CONST char *type, cio_entry *entry); | |
| #endif |