1 | /* |
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2 | * This program is free software; you can redistribute it and/or modify |
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3 | * it under the terms of the GNU General Public License as published by |
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4 | * the Free Software Foundation; either version 2 of the License, or |
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5 | * (at your option) any later version. |
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6 | * |
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7 | * This program is distributed in the hope that it will be useful, |
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8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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10 | * GNU General Public License for more details. |
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11 | * |
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12 | * You should have received a copy of the GNU General Public License |
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13 | * along with this program; if not, write to the Free Software |
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14 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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15 | * |
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16 | * Copyright (C) IBM Corp. 2005 |
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17 | * |
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18 | * Authors: Hollis Blanchard <hollisb@us.ibm.com> |
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19 | */ |
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20 | |
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21 | #include <xen/config.h> |
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22 | #include <xen/types.h> |
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23 | #include <xen/sched.h> |
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24 | #include <xen/init.h> |
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25 | #include <public/xen.h> |
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26 | #include <asm/current.h> |
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27 | #include <asm/papr.h> |
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28 | #include <asm/hcalls.h> |
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29 | |
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30 | static void h_put_term_char(struct cpu_user_regs *regs) |
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31 | { |
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32 | char data[(sizeof (u64) * 4) + 1]; |
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33 | ulong count; |
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34 | extern void serial_puts(int handle, const char *s); |
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35 | |
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36 | /* XXX what to do with 'channel' in r4? */ |
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37 | |
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38 | count = regs->gprs[5]; |
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39 | if (count > 16) { |
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40 | regs->gprs[3] = H_Parameter; |
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41 | return; |
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42 | } |
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43 | |
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44 | memcpy(data, ®s->gprs[6], count); |
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45 | data[count] = '\0'; |
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46 | |
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47 | serial_puts(0, data); |
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48 | regs->gprs[3] = H_Success; |
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49 | } |
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50 | |
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51 | static void h_get_term_char(struct cpu_user_regs *regs) |
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52 | { |
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53 | /* temporary hack to let us use xmon in dom0 */ |
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54 | extern char serial_getc_nb(int handle); |
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55 | char c; |
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56 | |
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57 | c = serial_getc_nb(0); |
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58 | if (c > 0) { |
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59 | regs->gprs[4] = 1; |
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60 | regs->gprs[5] = (ulong)c << (7 * 8); |
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61 | regs->gprs[6] = 0; /* paranoid */ |
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62 | } else { |
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63 | regs->gprs[4] = 0; |
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64 | } |
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65 | |
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66 | regs->gprs[3] = H_Success; |
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67 | } |
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68 | |
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69 | __init_papr_hcall(H_PUT_TERM_CHAR, h_put_term_char); |
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70 | __init_papr_hcall(H_GET_TERM_CHAR, h_get_term_char); |
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