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#include "dc21164FromGasSources.h" // DECchip 21164 specific definitions
#include "ev5_defs.h"
#include "fromHudsonOsf.h" // OSF/1 specific definitions
#include "fromHudsonMacros.h" // Global macro definitions
#include "ev5_impure.h" // Scratch & logout area data structures
#include "platform.h" // Platform specific definitions
.global palJToKern
.text 3
palJToKern:
/* Jump to kernel
args:
Kernel address - a0
PCBB - a1
First free PFN - a3?
Enable kseg addressing in ICSR
Enable kseg addressing in MCSR
Set VTBR -- Set to 1GB as per SRM, or maybe 8GB??
Set PCBB -- pass pointer in arg
Set PTBR -- get it out of PCB
Set KSP -- get it out of PCB
Jump to kernel address
Kernel args-
s0 first free PFN
s1 ptbr
s2 argc 0
s3 argv NULL
s5 osf_param (sysconfigtab) NULL
*/
ALIGN_BRANCH
ldq_p a0, 0(zero)
ldq_p a1, 8(zero)
ldq_p a3, 16(zero)
#ifdef undef
LDLI(t0,0x200000000) // 8GB, like the Mikasa
LDLI(t0,0x40000000) // 1GB, like the SRM
STALL // don't dual issue the load with mtpr -pb
#endif
/* Point the Vptbr at 8GB */
lda t0, 0x1(zero)
sll t0, 33, t0
mtpr t0, mVptBr // Load Mbox copy
mtpr t0, iVptBr // Load Ibox copy
STALL // don't dual issue the load with mtpr -pb
/* Turn on superpage mapping in the mbox and icsr */
lda t0, (2<<MCSR_V_SP)(zero) // Get a '10' (binary) in MCSR<SP>
STALL // don't dual issue the load with mtpr -pb
mtpr t0, mcsr // Set the super page mode enable bit
STALL // don't dual issue the load with mtpr -pb
lda t0, 0(zero)
mtpr t0, dtbAsn
mtpr t0, itbAsn
LDLI (t1,0x20000000)
STALL // don't dual issue the load with mtpr -pb
mfpr t0, icsr // Enable superpage mapping
STALL // don't dual issue the load with mtpr -pb
bis t0, t1, t0
mtpr t0, icsr
STALL // Required stall to update chip ...
STALL
STALL
STALL
STALL
ldq_p s0, PCB_Q_PTBR(a1)
sll s0, VA_S_OFF, s0 // Shift PTBR into position
STALL // don't dual issue the load with mtpr -pb
mtpr s0, ptPtbr // PHYSICAL MBOX INST -> MT PT20 IN 0,1
STALL // don't dual issue the load with mtpr -pb
ldq_p sp, PCB_Q_KSP(a1)
mtpr a0, excAddr // Load the dispatch address.
STALL // don't dual issue the load with mtpr -pb
bis a3, zero, a0 // first free PFN
ldq_p a1, PCB_Q_PTBR(a1) // ptbr
ldq_p a2, 24(zero) // argc
ldq_p a3, 32(zero) // argv
ldq_p a4, 40(zero) // environ
lda a5, 0(zero) // osf_param
STALL // don't dual issue the load with mtpr -pb
mtpr zero, dtbIa // Flush all D-stream TB entries
mtpr zero, itbIa // Flush all I-stream TB entries
br zero, 2f
ALIGN_BLOCK
2: NOP
mtpr zero, icFlush // Flush the icache.
NOP
NOP
NOP // Required NOPs ... 1-10
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP // Required NOPs ... 11-20
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP // Required NOPs ... 21-30
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP // Required NOPs ... 31-40
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP // Required NOPs ... 41-44
NOP
NOP
NOP
hw_rei_stall // Dispatch to kernel
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