Changes between Version 62 and Version 63 of boot_procedure

Timestamp:

Nov 7, 2019, 5:57:53 PM (5 years ago)

Author:

alain

Comment:

--

boot_procedure

@@ -48 +48 @@
 The two main constraint are the following: 
    * the ''kcode'' and ''kdata'' segments (in the KERNEL_CODE zone) must be entirely contained in one single big physical page (2 Mbytes), because it will be mapped as one single big page in all process virtual spaces.
-   * the BOOT_CODE zone (containing the boot loader instructions and data) must be entirely contained in the
-next big physical page, because it will be mapped in the boot-loader page table to allow the cores to access locally the boot code as soon as it has been copied in the local cluster.
-
-A core is identified by  two indexes: '''cxy''' is the cluster identifier, an '''lid''' is the core local index in cluster.
+   * the BOOT_CODE zone (containing the boot loader instructions and data) must be entirely contained in the next big physical page, because it will be mapped in the boot-loader page table to allow the cores to access locally the boot code as soon as it has been copied in the local cluster.
+
+A core[cxy][lid] is identified by  two indexes: '''cxy''' is the cluster identifier, an '''lid''' is the core local index in cluster.
 The CP0 register containing the core gid (global hardware identifier) has a fixed format:   '''gid''' = ('''cxy''' << 2) + '''lid'''
 
 All cores contribute to the boot procedure, but all cores are not simultaneously active:
- * in the first phase - fully sequencial - only core[0][0] is running (core 0 in cluster 0).
+ * in the first phase - fully sequencial - only core[0][0] is running.
  * In the second phase - partially parallel - only core[cxy][0] is running in each cluster. 
  * in the last phase - fully parallel - all core[cxy][lid] are running.
@@ -75 +74 @@
 === B2. Boot-loader sequencial phase ===
 
-In this phase, only core [0][0] is running, while all other cores are blocked in the preloaded, waiting to be activated by an IPI. 
+In this phase, only core [0][0] is running, while all other cores are blocked in the preloader, waiting to be activated by an IPI. 
 
 The first instructions of the boot-loader are defined in the ''boot_entry.S'' file. This assembly code is executed by all cores entering the boot-loader, but not at the same time.