[v4,2/3] hw/mips: Use bl_gen_kernel_jump to generate bootloaders

Commit Message

Philippe Mathieu-Daudé Oct. 26, 2022, 7:18 p.m. UTC

From: Jiaxun Yang <[e-mail]>

Replace embedded binary with generated code.

Signed-off-by: Jiaxun Yang <[e-mail]>
Message-Id: <[e-mail]>
[PMD: Pass semihosting_get_argc() to bl_gen_jump_kernel()]
Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
---
 hw/mips/malta.c | 43 ++++++++++++-------------------------------
 1 file changed, 12 insertions(+), 31 deletions(-)

Patch

diff --git a/hw/mips/malta.c b/hw/mips/malta.c
index 0e932988e0..e24572c885 100644
--- a/hw/mips/malta.c
+++ b/hw/mips/malta.c
@@ -35,6 +35,7 @@ 
 #include "hw/i2c/smbus_eeprom.h"
 #include "hw/block/flash.h"
 #include "hw/mips/mips.h"
+#include "hw/mips/bootloader.h"
 #include "hw/mips/cpudevs.h"
 #include "hw/pci/pci.h"
 #include "qemu/log.h"
@@ -866,30 +867,6 @@  static void write_bootloader(uint8_t *base, uint64_t run_addr,
     /* Second part of the bootloader */
     p = (uint32_t *) (base + 0x580);
 
-    if (semihosting_get_argc()) {
-        /* Preserve a0 content as arguments have been passed */
-        stl_p(p++, 0x00000000);              /* nop */
-    } else {
-        stl_p(p++, 0x24040002);              /* addiu a0, zero, 2 */
-    }
-
-    /* lui sp, high(ENVP_VADDR) */
-    stl_p(p++, 0x3c1d0000 | (((ENVP_VADDR - 64) >> 16) & 0xffff));
-    /* ori sp, sp, low(ENVP_VADDR) */
-    stl_p(p++, 0x37bd0000 | ((ENVP_VADDR - 64) & 0xffff));
-    /* lui a1, high(ENVP_VADDR) */
-    stl_p(p++, 0x3c050000 | ((ENVP_VADDR >> 16) & 0xffff));
-    /* ori a1, a1, low(ENVP_VADDR) */
-    stl_p(p++, 0x34a50000 | (ENVP_VADDR & 0xffff));
-    /* lui a2, high(ENVP_VADDR + 8) */
-    stl_p(p++, 0x3c060000 | (((ENVP_VADDR + 8) >> 16) & 0xffff));
-    /* ori a2, a2, low(ENVP_VADDR + 8) */
-    stl_p(p++, 0x34c60000 | ((ENVP_VADDR + 8) & 0xffff));
-    /* lui a3, high(ram_low_size) */
-    stl_p(p++, 0x3c070000 | (loaderparams.ram_low_size >> 16));
-    /* ori a3, a3, low(ram_low_size) */
-    stl_p(p++, 0x34e70000 | (loaderparams.ram_low_size & 0xffff));
-
     /* Load BAR registers as done by YAMON */
     stl_p(p++, 0x3c09b400);                  /* lui t1, 0xb400 */
 
@@ -941,13 +918,17 @@  static void write_bootloader(uint8_t *base, uint64_t run_addr,
 #endif
     stl_p(p++, 0xad280088);                  /* sw t0, 0x0088(t1) */
 
-    /* Jump to kernel code */
-    stl_p(p++, 0x3c1f0000 |
-          ((kernel_entry >> 16) & 0xffff));  /* lui ra, high(kernel_entry) */
-    stl_p(p++, 0x37ff0000 |
-          (kernel_entry & 0xffff));          /* ori ra, ra, low(kernel_entry) */
-    stl_p(p++, 0x03e00009);                  /* jalr ra */
-    stl_p(p++, 0x00000000);                  /* nop */
+    bl_gen_jump_kernel(&p,
+                       true, ENVP_VADDR - 64,
+                       /*
+                        * If semihosting is used, arguments have already been
+                        * passed, so we preserve $a0.
+                        */
+                       !semihosting_get_argc(), 2,
+                       true, ENVP_VADDR,
+                       true, ENVP_VADDR + 8,
+                       true, loaderparams.ram_low_size,
+                       kernel_entry);
 
     /* YAMON subroutines */
     p = (uint32_t *) (base + 0x800);