1 | /* |
---|
2 | * hal_vmm.c - Virtual Memory Manager Initialisation for TSAR |
---|
3 | * |
---|
4 | * Authors Alain Greiner (2016,2017,2018,2019) |
---|
5 | * |
---|
6 | * Copyright (c) UPMC Sorbonne Universites |
---|
7 | * |
---|
8 | * This file is part of ALMOS-MKH. |
---|
9 | * |
---|
10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
---|
11 | * under the terms of the GNU General Public License as published by |
---|
12 | * the Free Software Foundation; version 2.0 of the License. |
---|
13 | * |
---|
14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
---|
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
---|
17 | * General Public License for more details. |
---|
18 | * |
---|
19 | * You should have received a copy of the GNU General Public License |
---|
20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
---|
21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
---|
22 | */ |
---|
23 | |
---|
24 | #include <kernel_config.h> |
---|
25 | #include <hal_kernel_types.h> |
---|
26 | #include <hal_vmm.h> |
---|
27 | #include <hal_gpt.h> |
---|
28 | #include <process.h> |
---|
29 | #include <thread.h> |
---|
30 | #include <vseg.h> |
---|
31 | #include <xlist.h> |
---|
32 | #include <vmm.h> |
---|
33 | #include <remote_rwlock.h> |
---|
34 | |
---|
35 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
36 | // This file contains the TSAR specific code used to initialize the kernel process VMM, |
---|
37 | // or to update an user process VMM with informations related to the kernel vsegs. |
---|
38 | // As the TSAR architure does not use the DATA MMU, but use only the DATA extension |
---|
39 | // address register to access local and remote kernel data, the kernel VSL contains only |
---|
40 | // one "kcode" segment, and the kernel GPT contains only one big page in PT1[0] slot. |
---|
41 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
42 | |
---|
43 | // extern global variables |
---|
44 | extern process_t process_zero; |
---|
45 | extern chdev_directory_t chdev_dir; |
---|
46 | |
---|
47 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
48 | // This function is called by the process_zero_init() function during kernel_init. |
---|
49 | // It initializes the VMM of the kernel proces_zero (containing all kernel threads) |
---|
50 | // in the local cluster: For TSAR, it registers one "kcode" vseg in kernel VSL, |
---|
51 | // and registers one big page in slot[0] of kernel GPT. |
---|
52 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
53 | error_t hal_vmm_kernel_init( boot_info_t * info ) |
---|
54 | { |
---|
55 | error_t error; |
---|
56 | |
---|
57 | // get pointer on kernel GPT |
---|
58 | gpt_t * gpt = &process_zero.vmm.gpt; |
---|
59 | |
---|
60 | // get cluster identifier |
---|
61 | cxy_t cxy = local_cxy; |
---|
62 | |
---|
63 | // allocate memory for kernel GPT |
---|
64 | error = hal_gpt_create( gpt ); |
---|
65 | |
---|
66 | if( error ) |
---|
67 | { |
---|
68 | printk("\n[PANIC] in %s : cannot allocate kernel GPT in cluster %x\n", |
---|
69 | __FUNCTION__ , cxy ); |
---|
70 | hal_core_sleep(); |
---|
71 | } |
---|
72 | |
---|
73 | #if DEBUG_HAL_VMM |
---|
74 | thread_t * this = CURRENT_THREAD; |
---|
75 | printk("\n[%s] thread[%x,%x] enter in cluster %x / gpt %x\n", |
---|
76 | __FUNCTION__, this->process->pid, this->trdid, local_cxy, gpt ); |
---|
77 | #endif |
---|
78 | |
---|
79 | // compute attr and ppn for one PTE1 |
---|
80 | uint32_t attr = GPT_MAPPED | GPT_READABLE | GPT_CACHABLE | GPT_EXECUTABLE | GPT_GLOBAL; |
---|
81 | uint32_t ppn = cxy << 20; |
---|
82 | |
---|
83 | // register PTE1 in slot[0] of kernel GPT |
---|
84 | error = hal_gpt_set_pte( XPTR( cxy , gpt ) , 0 , attr , ppn ); |
---|
85 | |
---|
86 | if( error ) |
---|
87 | { |
---|
88 | printk("\n[PANIC] in %s : cannot initialize kernel GPT in cluster %x\n", |
---|
89 | __FUNCTION__ , cxy ); |
---|
90 | hal_core_sleep(); |
---|
91 | } |
---|
92 | |
---|
93 | #if DEBUG_HAL_VMM |
---|
94 | printk("\n[%s] thread[%x,%x] created PT1[0] : ppn %x / attr %x\n", |
---|
95 | __FUNCTION__, this->process->pid, this->trdid, ppn, attr ); |
---|
96 | #endif |
---|
97 | |
---|
98 | // create kcode vseg and register it in kernel VSL |
---|
99 | vseg_t * vseg = vmm_create_vseg( &process_zero, |
---|
100 | VSEG_TYPE_KCODE, |
---|
101 | info->kcode_base, |
---|
102 | info->kcode_size, |
---|
103 | 0, 0, // file ofset and file size (unused) |
---|
104 | XPTR_NULL, // no mapper |
---|
105 | local_cxy ); |
---|
106 | if( vseg == NULL ) |
---|
107 | { |
---|
108 | printk("\n[PANIC] in %s : cannot register vseg to VSL in cluster %x\n", |
---|
109 | __FUNCTION__ , cxy ); |
---|
110 | hal_core_sleep(); |
---|
111 | } |
---|
112 | |
---|
113 | #if DEBUG_HAL_VMM |
---|
114 | printk("\n[%s] thread[%x,%x] registered kcode vseg[%x,%x]\n", |
---|
115 | __FUNCTION__, this->process->pid, this->trdid, info->kcode_base, info->kcode_size ); |
---|
116 | hal_vmm_display( &process_zero , true ); |
---|
117 | #endif |
---|
118 | |
---|
119 | return 0; |
---|
120 | |
---|
121 | } // end hal_vmm_kernel_init() |
---|
122 | |
---|
123 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
124 | // This function registers in the VMM of an user process identified by the <process> |
---|
125 | // argument all required kernel vsegs. |
---|
126 | // For TSAR, it registers in the user VSL the "kcode" vseg, from the local kernel VSL, |
---|
127 | // and register in the user GPT the big page[0] from the local kernel GPT. |
---|
128 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
129 | error_t hal_vmm_kernel_update( process_t * process ) |
---|
130 | { |
---|
131 | error_t error; |
---|
132 | uint32_t attr; |
---|
133 | uint32_t ppn; |
---|
134 | |
---|
135 | // get cluster identifier |
---|
136 | cxy_t cxy = local_cxy; |
---|
137 | |
---|
138 | #if DEBUG_HAL_VMM |
---|
139 | thread_t * this = CURRENT_THREAD; |
---|
140 | printk("\n[%s] thread[%x,%x] enter in cluster %x \n", |
---|
141 | __FUNCTION__, this->process->pid, this->trdid, cxy ); |
---|
142 | hal_vmm_display( &process_zero , true ); |
---|
143 | hal_vmm_display( process , true ); |
---|
144 | #endif |
---|
145 | |
---|
146 | // get extended pointer on local kernel GPT |
---|
147 | xptr_t k_gpt_xp = XPTR( cxy , &process_zero.vmm.gpt ); |
---|
148 | |
---|
149 | // get ppn and attributes from slot[0] of kernel GPT |
---|
150 | hal_gpt_get_pte( k_gpt_xp , 0 , &attr , &ppn ); |
---|
151 | |
---|
152 | #if DEBUG_HAL_VMM |
---|
153 | printk("\n[%s] thread[%x,%x] get PT1[0] ( ppn %x / attr %x ) from kernel GPT\n", |
---|
154 | __FUNCTION__, this->process->pid, this->trdid, ppn, attr ); |
---|
155 | #endif |
---|
156 | |
---|
157 | // get extended pointer on user GPT |
---|
158 | xptr_t u_gpt_xp = XPTR( cxy , &process->vmm.gpt ); |
---|
159 | |
---|
160 | // update user GPT : set PTE1 in slot[0] |
---|
161 | error = hal_gpt_set_pte( u_gpt_xp , 0 , attr , ppn ); |
---|
162 | |
---|
163 | if( error ) |
---|
164 | { |
---|
165 | printk("\n[ERROR] in %s : cannot update user GPT in cluster %x\n", |
---|
166 | __FUNCTION__ , cxy ); |
---|
167 | return -1; |
---|
168 | } |
---|
169 | |
---|
170 | #if DEBUG_HAL_VMM |
---|
171 | printk("\n[%s] thread[%x,%x] registered PT1[0] ( ppn %x / attr %x ) to user GPT\n", |
---|
172 | __FUNCTION__, this->process->pid, this->trdid, ppn, attr ); |
---|
173 | #endif |
---|
174 | |
---|
175 | // get pointer on the unique vseg registered in kernel VSL |
---|
176 | xptr_t root_xp = XPTR( cxy , &process_zero.vmm.vsegs_root ); |
---|
177 | xptr_t vseg_xp = XLIST_FIRST( root_xp , vseg_t , xlist ); |
---|
178 | vseg_t * vseg = GET_PTR( vseg_xp ); |
---|
179 | |
---|
180 | // check vsegs_nr |
---|
181 | assert( (process_zero.vmm.vsegs_nr == 1 ) , |
---|
182 | "bad vsegs number in kernel VSL = %d\n", process_zero.vmm.vsegs_nr ); |
---|
183 | |
---|
184 | // update user VSL : register one new vseg for kcode |
---|
185 | vseg_t * new = vmm_create_vseg( process, |
---|
186 | vseg->type, |
---|
187 | vseg->min, |
---|
188 | vseg->max - vseg->min, |
---|
189 | 0, 0, // file ofset and file size (unused) |
---|
190 | XPTR_NULL, // no mapper |
---|
191 | local_cxy ); |
---|
192 | if( new == NULL ) |
---|
193 | { |
---|
194 | printk("\n[ERROR] in %s : cannot update user VSL in cluster %x\n", |
---|
195 | __FUNCTION__ , cxy ); |
---|
196 | return -1; |
---|
197 | } |
---|
198 | |
---|
199 | #if DEBUG_HAL_VMM |
---|
200 | printk("\n[%s] thread[%x,%x] created vseg %s ( base %x / size %x ) to user VSL\n", |
---|
201 | __FUNCTION__, this->process->pid, this->trdid, |
---|
202 | vseg_type_str(vseg->type) , vseg->min, (vseg->max - vseg->min) ); |
---|
203 | hal_vmm_display( process , true ); |
---|
204 | #endif |
---|
205 | |
---|
206 | return 0; |
---|
207 | |
---|
208 | } // end hal_vmm_kernel_update() |
---|
209 | |
---|
210 | ////////////////////////////////////////// |
---|
211 | void hal_vmm_display( process_t * process, |
---|
212 | bool_t mapping ) |
---|
213 | { |
---|
214 | // get pointer on process VMM |
---|
215 | vmm_t * vmm = &process->vmm; |
---|
216 | |
---|
217 | // get pointers on TXT0 chdev |
---|
218 | xptr_t txt0_xp = chdev_dir.txt_tx[0]; |
---|
219 | cxy_t txt0_cxy = GET_CXY( txt0_xp ); |
---|
220 | chdev_t * txt0_ptr = GET_PTR( txt0_xp ); |
---|
221 | |
---|
222 | // build extended pointers on TXT0 lock, GPT lock and VSL lock |
---|
223 | xptr_t txt_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
---|
224 | xptr_t vsl_lock_xp = XPTR( local_cxy , &vmm->vsl_lock ); |
---|
225 | xptr_t gpt_lock_xp = XPTR( local_cxy , &vmm->gpt_lock ); |
---|
226 | |
---|
227 | // get root of vsegs list |
---|
228 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
229 | |
---|
230 | // get the locks protecting TXT0, VSL, and GPT |
---|
231 | remote_rwlock_rd_acquire( vsl_lock_xp ); |
---|
232 | remote_rwlock_rd_acquire( gpt_lock_xp ); |
---|
233 | remote_busylock_acquire( txt_lock_xp ); |
---|
234 | |
---|
235 | nolock_printk("\n***** VSL and GPT for process %x in cluster %x / PT1 = %x\n", |
---|
236 | process->pid , local_cxy , vmm->gpt.ptr ); |
---|
237 | |
---|
238 | if( xlist_is_empty( root_xp ) ) |
---|
239 | { |
---|
240 | nolock_printk(" ... no vsegs registered\n"); |
---|
241 | } |
---|
242 | else // scan the list of vsegs |
---|
243 | { |
---|
244 | xptr_t iter_xp; |
---|
245 | xptr_t vseg_xp; |
---|
246 | vseg_t * vseg; |
---|
247 | |
---|
248 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
249 | { |
---|
250 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
---|
251 | vseg = GET_PTR( vseg_xp ); |
---|
252 | |
---|
253 | nolock_printk(" - %s : base = %X / size = %X / npages = %d\n", |
---|
254 | vseg_type_str(vseg->type), vseg->min, vseg->max - vseg->min, vseg->vpn_size ); |
---|
255 | |
---|
256 | if( mapping ) |
---|
257 | { |
---|
258 | vpn_t vpn = vseg->vpn_base; |
---|
259 | vpn_t vpn_max = vpn + vseg->vpn_size; |
---|
260 | ppn_t ppn; |
---|
261 | uint32_t attr; |
---|
262 | |
---|
263 | while( vpn < vpn_max ) // scan the PTEs |
---|
264 | { |
---|
265 | hal_gpt_get_pte( XPTR( local_cxy , &vmm->gpt ) , vpn , &attr , &ppn ); |
---|
266 | |
---|
267 | if( attr & GPT_MAPPED ) |
---|
268 | { |
---|
269 | if( attr & GPT_SMALL ) |
---|
270 | { |
---|
271 | nolock_printk(" . SMALL : vpn = %X / attr = %X / ppn = %X\n", |
---|
272 | vpn , attr , ppn ); |
---|
273 | vpn++; |
---|
274 | } |
---|
275 | else |
---|
276 | { |
---|
277 | nolock_printk(" . BIG : vpn = %X / attr = %X / ppn = %X\n", |
---|
278 | vpn , attr , ppn ); |
---|
279 | vpn += 512; |
---|
280 | } |
---|
281 | } |
---|
282 | else |
---|
283 | { |
---|
284 | vpn++; |
---|
285 | } |
---|
286 | } |
---|
287 | } |
---|
288 | } |
---|
289 | } |
---|
290 | |
---|
291 | // release locks |
---|
292 | remote_busylock_release( txt_lock_xp ); |
---|
293 | remote_rwlock_rd_release( gpt_lock_xp ); |
---|
294 | remote_rwlock_rd_release( vsl_lock_xp ); |
---|
295 | |
---|
296 | } // hal_vmm_display() |
---|
297 | |
---|