projects / OpenSPARC-T2-DV / blame
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|---|---|---|
| 86530b38 AT |
1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== | |
| 3 | * | |
| 4 | * OpenSPARC T2 Processor File: my_console.s | |
| 5 | * Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved | |
| 6 | * 4150 Network Circle, Santa Clara, California 95054, U.S.A. | |
| 7 | * | |
| 8 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or modify | |
| 11 | * it under the terms of the GNU General Public License as published by | |
| 12 | * the Free Software Foundation; version 2 of the License. | |
| 13 | * | |
| 14 | * This program is distributed in the hope that it will be useful, | |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 | * GNU General Public License for more details. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU General Public License | |
| 20 | * along with this program; if not, write to the Free Software | |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 22 | * | |
| 23 | * For the avoidance of doubt, and except that if any non-GPL license | |
| 24 | * choice is available it will apply instead, Sun elects to use only | |
| 25 | * the General Public License version 2 (GPLv2) at this time for any | |
| 26 | * software where a choice of GPL license versions is made | |
| 27 | * available with the language indicating that GPLv2 or any later version | |
| 28 | * may be used, or where a choice of which version of the GPL is applied is | |
| 29 | * otherwise unspecified. | |
| 30 | * | |
| 31 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 32 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 33 | * have any questions. | |
| 34 | * | |
| 35 | * | |
| 36 | * ========== Copyright Header End ============================================ | |
| 37 | */ | |
| 38 | uart_init: | |
| 39 | /* | |
| 40 | * Supports only 16550 UART | |
| 41 | * | |
| 42 | * %g1 is UART base address | |
| 43 | * %g2,%g3 clobbered | |
| 44 | * %g7 return address | |
| 45 | */ | |
| 46 | ldub [%g1 + LSR_ADDR], %g2 ! read LSR | |
| 47 | stb %g0, [%g1 + IER_ADDR] ! clear IER | |
| 48 | stb %g0, [%g1 + FCR_ADDR] ! clear FCR, disable FIFO | |
| 49 | mov (FCR_XMIT_RESET | FCR_RCVR_RESET), %g3 | |
| 50 | stb %g3, [%g1 + FCR_ADDR] ! reset FIFOs in FCR | |
| 51 | mov FCR_FIFO_ENABLE, %g3 | |
| 52 | stb %g3, [%g1 + FCR_ADDR] ! FCR enable FIFO | |
| 53 | mov (LCR_DLAB | LCR_8N1), %g3 | |
| 54 | stb %g3, [%g1 + LCR_ADDR] ! set LCR for 8-n-1, set DLAB | |
| 55 | ! DLAB = 1 | |
| 56 | mov DLL_9600, %g3 | |
| 57 | stb %g3, [%g1 + DLL_ADDR] ! set baud rate = 9600 | |
| 58 | stb %g0, [%g1 + DLM_ADDR] ! set MS = 0 | |
| 59 | ! disable DLAB | |
| 60 | mov LCR_8N1, %g3 ! set LCR for 8-n-1, unset DLAB | |
| 61 | stb %g3, [%g1 + LCR_ADDR] ! set LCR for 8-n-1, unset DLAB | |
| 62 | jmp %g7 + 4 | |
| 63 | nop | |
| 64 | ||
| 65 | ||
| 66 | puts: | |
| 67 | setx HV_UART, %g3, %g2 | |
| 68 | 1: | |
| 69 | ldub [%g2 + LSR_ADDR], %g3 | |
| 70 | btst LSR_THRE, %g3 | |
| 71 | bz 1b | |
| 72 | nop | |
| 73 | ||
| 74 | 1: | |
| 75 | ldub [%g1], %g3 | |
| 76 | cmp %g3, 0 | |
| 77 | inc %g1 | |
| 78 | bne,a,pt %icc, 2f | |
| 79 | stb %g3, [%g2] | |
| 80 | jmp %g7 + 4 | |
| 81 | nop | |
| 82 | ||
| 83 | 2: | |
| 84 | ldub [%g2 + LSR_ADDR], %g3 | |
| 85 | btst LSR_TEMT, %g3 | |
| 86 | bz 2b | |
| 87 | nop | |
| 88 | ba,a 1b | |
| 89 |