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polling detection: communication poll fifo to avoid comm data loss

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This commit is contained in:
kub 2019-05-22 21:38:59 +02:00
parent 0495df5d0c
commit e43998086c
5 changed files with 214 additions and 97 deletions
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44
pico/32x/memory_arm.S
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@ -130,17 +130,21 @@ sh2_read32_dram:
#endif
sh2_write8_sdram:
@ preserve r0,r2 for tail call
@ preserve r0-r2 for tail call
ldr ip, [r2, #OFS_SH2_p_sdram]
eor r3, r0, #1
mov r3, r3, lsl #SH2_RAM_SHIFT
strb r1, [ip, r3, lsr #SH2_RAM_SHIFT]
#ifdef DRC_SH2
ldr ip, [r2, #OFS_SH2_p_drcblk_ram]
ldrb r1, [ip, r3, lsr #SH2_RAM_SHIFT+1]
bic r0, r0, #1
cmp r1, #0
ldrb r3, [ip, r3, lsr #SH2_RAM_SHIFT+1]
cmp r3, #0
bxeq lr
ldr ip, [r2, #OFS_SH2_p_sdram]
bic r0, r0, #1
mov r3, r0, lsl #SH2_RAM_SHIFT
mov r3, r3, lsr #SH2_RAM_SHIFT
ldrh r1, [ip, r3]
b sh2_sdram_checks
#else
bx lr
@ -172,15 +176,15 @@ sh2_write8_dram:
bx lr
sh2_write16_sdram:
@ preserve r0,r2 for tail call
@ preserve r0-r2 for tail call
ldr ip, [r2, #OFS_SH2_p_sdram]
mov r3, r0, lsl #SH2_RAM_SHIFT
mov r3, r3, lsr #SH2_RAM_SHIFT
strh r1, [ip, r3]
#ifdef DRC_SH2
ldr ip, [r2, #OFS_SH2_p_drcblk_ram]
ldrb r1, [ip, r3, lsr #1]
cmp r1, #0
ldrb r3, [ip, r3, lsr #1]
cmp r3, #0
bxeq lr
b sh2_sdram_checks
#else
@ -219,24 +223,19 @@ sh2_write16_dram:
bx lr
sh2_write32_sdram:
@ preserve r0,r2 for tail call
@ preserve r0-r2 for tail call
ldr ip, [r2, #OFS_SH2_p_sdram]
mov r1, r1, ror #16
mov r3, r0, lsl #SH2_RAM_SHIFT
str r1, [ip, r3, lsr #SH2_RAM_SHIFT]
#ifdef DRC_SH2
ldr ip, [r2, #OFS_SH2_p_drcblk_ram]
ldrb r1, [ip, r3, lsr #SH2_RAM_SHIFT+1]!
cmp r1, #0
beq 1f
stmfd sp!, {r0, r2, ip, lr}
b sh2_sdram_checks
ldmfd sp!, {r0, r2, ip, lr}
1: ldrb r1, [ip, #1]
add r0, r0, #2
cmp r1, #0
ldrb r3, [ip, r3, lsr #SH2_RAM_SHIFT+1]!
ldrb ip, [ip, #1]
orrs r3, r3, ip, lsl #16
bxeq lr
b sh2_sdram_checks
mov r1, r1, ror #16
b sh2_sdram_checks_l
#else
bx lr
#endif
@ -250,15 +249,14 @@ sh2_write32_da:
#ifdef DRC_SH2
ldr ip, [r2, #OFS_SH2_p_drcblk_da]
ldrb r1, [ip, r3, lsr #SH2_DA_SHIFT+1]!
cmp r1, #0
beq 1f
ldrb ip, [ip, #1]
orrs r3, r1, ip, lsl #16
bxeq lr
stmfd sp!, {r0, r2, ip, lr}
bl sh2_drc_wcheck_da
ldmfd sp!, {r0, r2, ip, lr}
1: ldrb r1, [ip, #1]
add r0, r0, #2
cmp r1, #0
bxeq lr
mov r1, ip
b sh2_drc_wcheck_da
#else
bx lr