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: Jimi Xenidis <jimix@watson.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 | #define DABR_BT (1UL << 2) |
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31 | #define DABR_DW (1UL << 1) |
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32 | #define DABR_DR (1UL << 0) |
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33 | |
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34 | #define DABRX_BT (1UL << 3) |
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35 | #define DABRX_HYP (1UL << 2) |
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36 | #define DABRX_PNH (1UL << 1) |
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37 | #define DABRX_PRO (1UL << 0) |
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38 | |
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39 | static inline int has_dabrx(void) { return 1; } |
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40 | |
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41 | static void h_set_dabr(struct cpu_user_regs *regs) |
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42 | { |
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43 | ulong dabr = regs->gprs[4]; |
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44 | |
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45 | if (!has_dabrx()) { |
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46 | if (!(dabr & DABR_BT)) { |
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47 | regs->gprs[3] = H_Parameter; |
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48 | return; |
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49 | } |
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50 | } else { |
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51 | asm volatile("mtspr %0,%1" : : "I" (SPRN_DABRX), "r" (2) : "memory"); |
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52 | } |
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53 | asm volatile("mtspr %0,%1" : : "I" (SPRN_DABR), "r" (dabr) : "memory"); |
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54 | regs->gprs[3] = H_Success; |
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55 | } |
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56 | |
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57 | static void h_set_xdabr(struct cpu_user_regs *regs) |
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58 | { |
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59 | ulong dabr = regs->gprs[4]; |
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60 | ulong dabrx = regs->gprs[5]; |
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61 | |
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62 | if (!has_dabrx()) { |
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63 | regs->gprs[3] = H_Function; |
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64 | return; |
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65 | } |
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66 | /* make sure reserved bits are 0 */ |
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67 | if ((dabrx & ~((DABRX_BT << 1) - 1)) != 0) { |
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68 | regs->gprs[3] = H_Parameter; |
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69 | return; |
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70 | } |
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71 | if ((dabrx & DABRX_HYP) || dabrx == 0) { |
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72 | regs->gprs[3] = H_Parameter; |
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73 | return; |
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74 | } |
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75 | asm volatile("mtspr %0,%1; mtspr %2,%3" |
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76 | : /* output */ : |
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77 | "I" (SPRN_DABR), "r" (dabr), |
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78 | "I" (SPRN_DABRX), "r" (dabrx) : "memory"); |
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79 | |
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80 | regs->gprs[3] = H_Success; |
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81 | } |
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82 | |
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83 | __init_papr_hcall(H_SET_DABR, h_set_dabr); |
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84 | __init_papr_hcall(H_SET_XDABR, h_set_xdabr); |
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