Changeset 9280dd0 in mainline

Timestamp:

2017-11-16T17:12:03Z (6 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

efb9fd08

Parents:

92232331

git-author:

Jakub Jermar <jakub@…> (2017-11-16 17:10:36)

git-committer:

Jakub Jermar <jakub@…> (2017-11-16 17:12:03)

Message:

Remove the Simics SMP hack

We haven't had access to Simics for years so there is no reason to keep
this around.

Files:

• HelenOS.config (modified) (1 diff)
• kernel/arch/sparc64/src/smp/sun4v/smp.c (modified) (2 diffs)
• kernel/arch/sparc64/src/sun4v/start.S (modified) (1 diff)

HelenOS.config

@@ -397 +397 @@
 ! [PLATFORM=sparc64] CONFIG_VIRT_IDX_DCACHE (y/n)
 
-% Simics SMP Hack
-! [PROCESSOR=sun4v&CONFIG_SMP=y] CONFIG_SIMICS_SMP_HACK (n/y)
-
 % Support for userspace debuggers
 ! CONFIG_UDEBUG (y/n)

kernel/arch/sparc64/src/smp/sun4v/smp.c

@@ -81 +81 @@
 unsigned int max_core_strands = 0;
 
-#ifdef CONFIG_SIMICS_SMP_HACK
-/**
- * Copies a piece of HelenOS code to the place where OBP had its IPI handler.
- * By sending an IPI by the BSP to the AP the code will be executed.
- * The code will jump to the first instruction of the kernel. This is
- * a workaround how to make APs execute HelenOS code on Simics.
- */
-static void simics_smp_hack_init(void) {
-        asm volatile (
-                "setx temp_cpu_mondo_handler, %g4, %g6 \n"
-                "setx 0x80200f80, %g4, %g7 \n"
-
-                "ldx [%g6], %g4 \n"
-                "stxa %g4, [%g7] 0x14 \n"
-                "membar #Sync \n"
-
-                "add %g7, 0x8, %g7 \n"
-                "ldx [%g6 + 0x8], %g4 \n"
-                "stxa %g4, [%g7] 0x14 \n"
-                "membar #Sync \n"
-
-                "add %g7, 0x8, %g7 \n"
-                "ldx [%g6 + 0x10], %g4 \n"
-                "stxa %g4, [%g7] 0x14 \n"
-                "membar #Sync \n"
-
-                "add %g7, 0x8, %g7 \n"
-                "ldx [%g6 + 0x18], %g4 \n"
-                "stxa %g4, [%g7] 0x14 \n"
-                "membar #Sync \n"
-
-                "add %g7, 0x8, %g7 \n"
-                "ldx [%g6 + 0x20], %g4 \n"
-                "stxa %g4, [%g7] 0x14 \n"
-                "membar #Sync \n"
-
-                "add %g7, 0x8, %g7 \n"
-                "ldx [%g6 + 0x28], %g4 \n"
-                "stxa %g4, [%g7] 0x14 \n"
-                "membar #Sync \n"
-
-                "add %g7, 0x8, %g7 \n"
-                "ldx [%g6 + 0x30], %g4 \n"
-                "stxa %g4, [%g7] 0x14 \n"
-                "membar #Sync \n"
-
-                "add %g7, 0x8, %g7 \n"
-                "ldx [%g6 + 0x38], %g4 \n"
-                "stxa %g4, [%g7] 0x14 \n"
-                "membar #Sync \n"
-
-                "add %g7, 0x8, %g7 \n"
-                "ldx [%g6 + 0x40], %g4 \n"
-                "stxa %g4, [%g7] 0x14 \n"
-                "membar #Sync \n"
-
-                "flush %i7"
-
-                );
-}
-#endif
-
 #if 0
 /**
@@ -372 +310 @@
 {
         detect_execution_units();
-#ifdef CONFIG_SIMICS_SMP_HACK
-        simics_smp_hack_init();
-#endif
 }
 

kernel/arch/sparc64/src/sun4v/start.S

@@ -309 +309 @@
         ba,a %xcc, 0b
 
-.align 8
-SYMBOL(temp_cpu_mondo_handler)
-
-        set 0x3c, %o0
-        set 0x15, %o5
-        ta 0x80
-
-        mov 0, %o0
-        setx before_ap_boots, %g1, %o1
-        setx 0x80400000, %g1, %o2
-        add %o1, %o2, %o1
-        __HYPERCALL_FAST(MMU_ENABLE)
-
-before_ap_boots:
-        setx 0x80400000, %g1, %o0
-        ba,a %xcc, kernel_image_start
-
 .section K_DATA_START, "aw", @progbits