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TCC78x: Enable interrupts/threading in the bootloader (required now that the storage driver yields).
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21486 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rob Purchase
parent
5e24a2c98c
commit
f62388f82c
6 changed files with 52 additions and 112 deletions
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@ -94,9 +94,8 @@ start_loc:
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ldr pc, =copied_start /* jump to the relocated start_loc: */
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copied_start:
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#endif
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#else
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/* We don't use interrupts in the bootloader */
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#endif /* TCCBOOT */
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#endif /* BOOTLOADER */
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/* Set up stack for IRQ mode */
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mov r0,#0xd2
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@ -107,13 +106,15 @@ copied_start:
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mov r0,#0xd1
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msr cpsr, r0
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ldr sp, =fiq_stack
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#ifndef BOOTLOADER
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/* Load the banked FIQ mode registers with useful values here.
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These values will be used in the FIQ handler in pcm-tcc780x.c */
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.equ DADO_BASE, 0xF0059020
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ldr r10, =DADO_BASE
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ldr r11, =dma_play_data
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#endif
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/* Let abort and undefined modes use IRQ stack */
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mov r0,#0xd7
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@ -122,7 +123,6 @@ copied_start:
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mov r0,#0xdb
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msr cpsr, r0
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ldr sp, =irq_stack
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#endif
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/* Switch to supervisor mode */
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mov r0,#0xd3
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@ -176,18 +176,19 @@ copied_start:
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mcr p15, 0, r0, c7, c6, 0 /* Invalidate Dcache */
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mcr p15, 0, r1, c8, c7, 0 /* Invalidate TLB */
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#if !defined(BOOTLOADER) && !defined(STUB)
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#ifndef STUB
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/* Copy exception handler code to address 0 */
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ldr r2, =_vectorsstart
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ldr r3, =_vectorsend
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ldr r4, =_vectorscopy
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mov r2, #0x0
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ldr r3, =vectors_start
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ldr r4, =vectors_end
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1:
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cmp r3, r2
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ldrhi r5, [r4], #4
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cmp r4, r3
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ldrhi r5, [r3], #4
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strhi r5, [r2], #4
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bhi 1b
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#ifndef BOOTLOADER
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/* Copy the IRAM (SRAM) */
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ldr r2, =_iramcopy
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ldr r3, =_iramstart
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@ -226,7 +227,8 @@ copied_start:
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ldrhi r5, [r2], #4
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strhi r5, [r3], #4
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bhi 1b
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#endif /* !BOOTLOADER,!STUB */
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#endif /* !BOOTLOADER */
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#endif /* !STUB */
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/* Initialise bss section to zero */
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ldr r2, =_edata
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@ -250,10 +252,9 @@ copied_start:
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bl main
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/* main() should never return */
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#ifndef BOOTLOADER
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/* Exception handlers. Will be copied to address 0 after memory remapping */
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.section .vectors,"aw"
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vectors_start:
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ldr pc, [pc, #24]
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ldr pc, [pc, #24]
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ldr pc, [pc, #24]
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@ -274,6 +275,7 @@ vectors:
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.word reserved_handler
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.word irq_handler
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.word fiq_handler
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vectors_end:
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.text
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@ -304,13 +306,16 @@ data_abort_handler:
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mov r1, #2
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b UIE
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#ifdef BOOTLOADER
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fiq_handler:
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subs pc, lr, #4
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#endif
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#if defined(STUB)
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UIE:
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b UIE
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#endif
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/* We don't use interrupts in the bootloader */
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/* Align stacks to cache line boundary */
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.balign 16
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@ -321,5 +326,3 @@ irq_stack:
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/* 256 words of FIQ stack */
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.space 256*4
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fiq_stack:
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#endif
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@ -38,5 +38,25 @@ void tick_start(unsigned int interval_in_ms)
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TCFG(0) = TCFG_CLEAR | (0 << TCFG_SEL) | TCFG_IEN | TCFG_EN;
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}
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/* NB: Since we are using a single timer IRQ, tick tasks are dispatched as
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part of the central timer IRQ processing in timer-tcc780x.c */
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/* Timer interrupt processing - all timers (inc. tick) share a single IRQ */
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void TIMER0(void)
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{
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if (TIREQ & TIREQ_TF0) /* Timer0 reached ref value */
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{
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/* Run through the list of tick tasks */
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call_tick_tasks();
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/* reset Timer 0 IRQ & ref flags */
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TIREQ = TIREQ_TI0 | TIREQ_TF0;
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}
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if (TIREQ & TIREQ_TF4) /* Timer4 reached ref value */
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{
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/* dispatch user timer */
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if (pfn_timer != NULL)
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pfn_timer();
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TIREQ = TIREQ_TI4 | TIREQ_TF4;
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}
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}
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@ -23,8 +23,6 @@
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#include "system.h"
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#include "panic.h"
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#if !defined(BOOTLOADER)
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#define default_interrupt(name) \
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extern __attribute__((weak,alias("UIRQ"))) void name (void)
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@ -144,8 +142,6 @@ void irq_handler(void)
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"subs pc, lr, #4 \n"); /* Return from IRQ */
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}
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#endif /* !defined(BOOTLOADER) */
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/* TODO - these should live in the target-specific directories and
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once we understand what all the GPIO pins do, move the init to the
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@ -254,8 +250,6 @@ void system_init(void)
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/* mask all interrupts */
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IEN = 0;
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#if !defined(BOOTLOADER)
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/* Set DAI interrupts as FIQ, all others are IRQ. */
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IRQSEL = ~(DAI_RX_IRQ_MASK | DAI_TX_IRQ_MASK);
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@ -272,8 +266,6 @@ void system_init(void)
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}
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ALLMASK = 3; /* Global FIQ/IRQ unmask */
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#endif /* !defined(BOOTLOADER) */
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gpio_init();
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clock_init();
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@ -81,26 +81,3 @@ void __timer_unregister(void)
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restore_interrupt(oldstatus);
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}
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/* Timer interrupt processing - all timers (inc. tick) have a single IRQ */
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void TIMER0(void)
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{
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if (TIREQ & TIREQ_TF0) /* Timer0 reached ref value */
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{
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/* Run through the list of tick tasks */
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call_tick_tasks();
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/* reset Timer 0 IRQ & ref flags */
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TIREQ = TIREQ_TI0 | TIREQ_TF0;
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}
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if (TIREQ & TIREQ_TF4) /* Timer4 reached ref value */
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{
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/* dispatch user timer */
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if (pfn_timer != NULL)
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pfn_timer();
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TIREQ = TIREQ_TI4 | TIREQ_TF4;
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}
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}
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