diff options
Diffstat (limited to 'nuttx/arch/z80/src/z8/z8_head.S')
| -rwxr-xr-x | nuttx/arch/z80/src/z8/z8_head.S | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/nuttx/arch/z80/src/z8/z8_head.S b/nuttx/arch/z80/src/z8/z8_head.S index 49e0bd756..63ff14482 100755 --- a/nuttx/arch/z80/src/z8/z8_head.S +++ b/nuttx/arch/z80/src/z8/z8_head.S @@ -92,8 +92,7 @@ xref _len_pramseg
xref _low_pram_romdata
#endif
- xref _far_stack
- xref _near_stack
+ xref _far_stacktop
xdef _z8_reset
xdef __intrp
@@ -128,8 +127,8 @@ _z8_reset: /* Initialize the stack pointer */
- ldx spl, #low(_far_stack+1)
- ldx sph, #high(_far_stack+1)
+ ldx spl, #low(_far_stacktop+1)
+ ldx sph, #high(_far_stacktop+1)
/* Clear internal register ram area (c_nearbss) */
@@ -165,16 +164,20 @@ _z8_reset3: /* Copy ROM data into internal RAM */
_z8_reset4:
+#ifdef CONFIG_Z8_COPYNEARDATA
ld r0, #high(_low_near_romdata)
ld r1, #low(_low_near_romdata)
ld r3, #_len_neardata
ld r4, #_low_neardata
- or r3, r3
+ cp r3, #0
+ jr z, _z8_reset6
_z8_reset5:
ldci @r4, @rr0
djnz r3, _z8_reset5
+_z8_reset6:
+#endif
/* Copy ROM data into extended RAM */
ld r0, #high(_low_fardata)
@@ -186,19 +189,19 @@ _z8_reset5: ld r6, r4
or r6, r5
- jr z, _z8_reset7
+ jr z, _z8_reset8
-_z8_reset6:
+_z8_reset7:
ldc r6, @rr2
ldx @rr0, r6
incw rr0
incw rr2
decw rr4
- jr nz, _z8_reset6
+ jr nz, _z8_reset7
/* Copy ROM copy of code into Program RAM */
-_z8_reset7:
+_z8_reset8:
#ifdef CONFIG_Z8_COPYPRAM
ld r0, #high(_low_pramseg)
ld r1, #low(_low_pramseg)
@@ -209,17 +212,17 @@ _z8_reset7: ld r6, r4
or r6, r5
- jr z, _z8_reset9
+ jr z, _z8_reset10
-_z8_reset8:
+_z8_reset9:
ldc r6, @rr2
ldc @rr0, r6
incw rr0
incw rr2
decw rr4
- jr nz, _z8_reset8
+ jr nz, _z8_reset9
-_z8_reset9:
+_z8_reset10:
#endif
/* Start NuttX */
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