Changeset 629 for trunk/softs/giet_tsar/reset.S

Timestamp:

Feb 12, 2014, 9:51:23 AM (11 years ago)

Author:

alain

Message:

• Updatre the gier_tsar to support the vci_iopic component in the tsar_generic_leti plat-form.
• Modify the soft_transpose_giet application to make optional the graphic display on frame buffer and to introduce a systematic auto-check

File:

• trunk/softs/giet_tsar/reset.S (modified) (5 diffs)

trunk/softs/giet_tsar/reset.S

@@ -10 +10 @@
 *
 * As we don't want to use the virtual memory, the physical address is 
-* equal to  the virtual address (identity mapping) and all processors use
-* the physical memory bank in cluster 0. Both the reset base address and 
-* the kernel base address can be redefined to use a physical memory bank
-* smaller than 4 Gbytes.
+* equal to  the virtual address (identity mapping) and all processors stacks
+* and code segments are allocated in the physical memory bank in cluster 0. 
+*
+* Both the reset base address and the kernel base address must be redefined
+* to use a physical memory bank smaller than 2 Gbytes.
 *
 * There is one XCU iand one MMC per cluster.
-* All other peripherals (including the boot ROM) are located in cluster 0.
-* Only two HWI interrupts are supported:
-* - IRQ_IN[0]      IOC 
-* - IRQ_IN[12]     MMC
+*
+* There is one IOPIC component in cluster_io.
+*
+* There is two sets of peripherals:
+*
+* 1) A block device and a single channel TTY controller are available 
+*    in cluster(0,0).
+*
+* 2) Other peripherals (including another Blockdevice, a multi-channels TTY 
+*    contrÃŽler, a Frame buffer) are located in cluster_io.
+*    For those externals peripherals, hardware interrupts (HWI) are translated
+*    to software interrupts (WTI) by and IOPIC component, that is programmed
+*    to route all SWI to to processor 0 in cluster (0,0).
 *
 * The boot sequence is the following:
@@ -25 +35 @@
 *   - Each processor initializes the CP0 EBASE register
 *       - Only processor 0 initializes the Interrupt vector.
+*       - Only processor 0 initializes the IOPIC component.
 *   - Each processor initializes its private XCU mask.
 *       - Each processor initializes the Status Register (SR) 
@@ -37 +48 @@
         .extern seg_stack_base
         .extern seg_xcu_base
+        .extern seg_pic_base
     .extern seg_kcode_base
         .extern _interrupt_vector
         .extern _ioc_isr
         .extern _mmc_isr
+    .extern _tty_isr
     .extern main
 
@@ -62 +75 @@
     la      $27,    seg_stack_base
     addi    $26,    $10,    1               /* $26 <= (proc_id + 1)           */
-    sll     $26,    $26,    16          /* $26 <= (proc_id + 1) * 64K     */
+    sll     $26,    $26,    14          /* $26 <= (proc_id + 1) * 16K     */
     addu    $29,    $27,    $26             /* $29 <= seg_stack_base(proc_id) */
 
@@ -69 +82 @@
     mtc0    $26,    CP0_EBASE           /* CP0_EBASE <= seg_kcode_base */
 
-/* only proc (0,0,0) initializes interrupt vector */
+/* only proc (0,0,0) initializes interrupt vector for IOC, TTY, MMC     */
     bne     $10,    $0,    reset_xcu
     nop
 
-    la      $26,    _interrupt_vector   /* interrupt vector address */
+    la      $26,    _interrupt_vector   /* interrupt vector address                */
+    la      $27,    _mmc_isr 
+    sw      $27,    32($26)             /* interrupt_vector[8] <= _mmc_isr         */
     la      $27,    _ioc_isr 
-    sw      $27,     0($26)             /* interrupt_vector[0] <= _isr_ioc */
-    la      $27,    _mmc_isr 
-    sw      $27,     48($26)            /* interrupt_vector[12] <= _isr_mmc */
-    
+    sw      $27,    36($26)             /* interrupt_vector[9] <= _ioc_isr         */
+    la      $27,    _tty_isr 
+    sw      $27,    40($26)             /* interrupt_vector[10] <= _tty_isr        */
+
+/* only proc (0,0,0) initializes IOPIC : IOPIC_ADDRESS[i] <= &XICU[0].WTI_REG[i]   */
+
+    li      $20,    X_SIZE
+    addi    $20,    $20,    -1
+    sll     $20,    $20,    4
+    li      $21,    Y_SIZE
+    add     $22,    $20,    $21         /* $22 <= cluster(X_SIZE-1, Y_SIZE)        */
+
+    mtc2    $22,    CP2_PADDR_EXT       /* CP2_PADDR_EXT <= cluster_io             */
+
+    li      $24,    16                  /* $24  iteration (de)counter              */
+    la      $27,    seg_xcu_base        /* $27 <= &(XICU[0].WTI_REG[0])            */
+    la      $26,    seg_pic_base        /* $26 <= &IOPIC_ADDRESS[0]                */
+
+reset_loop:
+    sw      $27,    0($26)              /* IOPIC_ADDRESS[i] <= &XICU[0].WTI_REG[i] */
+    addi    $24,    $24,    -1          /* decrement iteration index               */
+    addi    $27,    $27,     4          /* $27 <= &(XICU[0].WTI_REG[i++]           */
+    addi    $26,    $26,     16         /* $26 <= &IOPIC_ADDRESS[i++]              */
+    bne     $24,    $0, reset_loop
+    nop
+
+    mtc2    $0,     CP2_PADDR_EXT       /* CP2_PADDR_EXT <= zero                   */
+   
 reset_xcu:
 
-/* only proc (x,y,0) receive IRQs and initialise its private XCU mask */
+/* only proc (x,y,0) receive IRQs and initialise HWI and WTI XICU masks */
     bne     $11,    $0,     reset_end
     nop
     la      $26,    seg_xcu_base
-    li      $27,    0b010010000000      /* offset for MSK_HWI_ENABLE & lpid == 0 */
-    addu    $24,    $26,    $27         /* $24 <= &MASK  */
-    li      $25,    0x00001001              /* IOC: IRQ[0] / MEMC: IRQ[12] */
-    sw      $25,    0($24)              /* set MASK */
+    li      $27,    0b010010000000      /* offset for MSK_HWI_ENABLE[lpid == 0]    */
+    addu    $24,    $26,    $27         /* $24 <= &HWI_MASK                        */
+    li      $25,    0x0700                      /* TTY:HWI[10]  IOC:HWI[9]  MEMC:HWI[8]    */
+    sw      $25,    0($24)              /* set HWI mask                            */
+
+    li      $27,    0b011010000000      /* offset for MSK_WTI_ENABLE[lpid == 0]    */
+    addu    $24,    $26,    $27         /* $24 <= $WTI_MASK                        */
+    li      $25,    0xFFFFFFFF          /* all WTI enabled                         */
+    sw      $25,    0($24)              /* set WTI mask                            */
 
 reset_end: